diff --git a/awesome.c b/awesome.c
index 8849c5e8c..1ae0b80d5 100644
--- a/awesome.c
+++ b/awesome.c
@@ -246,7 +246,7 @@ xerrorstart(Display * disp __attribute__ ((unused)), XErrorEvent * ee __attribut
  * \ingroup ui_callback
  */
 void
-uicb_quit(int screen __attribute__ ((unused)), const char *arg __attribute__ ((unused)))
+uicb_quit(int screen __attribute__ ((unused)), char *arg __attribute__ ((unused)))
 {
     running = False;
 }
diff --git a/client.c b/client.c
index dabd0e621..0dc241263 100644
--- a/client.c
+++ b/client.c
@@ -593,7 +593,7 @@ client_isvisible(Client *c, int screen)
  * \ingroup ui_callback
  */
 void
-uicb_client_settrans(int screen __attribute__ ((unused)), const char *arg)
+uicb_client_settrans(int screen __attribute__ ((unused)), char *arg)
 {
     double delta = 100.0, current_opacity = 100.0;
     unsigned char *data;
@@ -642,7 +642,7 @@ uicb_client_settrans(int screen __attribute__ ((unused)), const char *arg)
  * \ingroup ui_callback
  */
 void
-uicb_setborder(int screen, const char *arg)
+uicb_setborder(int screen, char *arg)
 {
     if(!arg)
         return;
@@ -652,7 +652,7 @@ uicb_setborder(int screen, const char *arg)
 }
 
 void
-uicb_client_swapnext(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_swapnext(int screen, char *arg __attribute__ ((unused)))
 {
     Client *next, *sel = globalconf.focus->client;
 
@@ -670,7 +670,7 @@ uicb_client_swapnext(int screen, const char *arg __attribute__ ((unused)))
 }
 
 void
-uicb_client_swapprev(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_swapprev(int screen, char *arg __attribute__ ((unused)))
 {
     Client *prev, *sel = globalconf.focus->client;
 
@@ -688,7 +688,7 @@ uicb_client_swapprev(int screen, const char *arg __attribute__ ((unused)))
 }
 
 void
-uicb_client_moveresize(int screen, const char *arg)
+uicb_client_moveresize(int screen, char *arg)
 {
     int nx, ny, nw, nh, ox, oy, ow, oh;
     char x[8], y[8], w[8], h[8];
@@ -727,7 +727,7 @@ uicb_client_moveresize(int screen, const char *arg)
  * \ingroup ui_callback
  */
 void
-uicb_client_kill(int screen __attribute__ ((unused)), const char *arg __attribute__ ((unused)))
+uicb_client_kill(int screen __attribute__ ((unused)), char *arg __attribute__ ((unused)))
 {
     XEvent ev;
     Client *sel = globalconf.focus->client;
diff --git a/focus.c b/focus.c
index b4b94a67b..5e6c2cad7 100644
--- a/focus.c
+++ b/focus.c
@@ -107,7 +107,7 @@ focus_get_latest_client_for_tag(FocusList *head, int screen, Tag *t)
 }
 
 void
-uicb_focus_history(int screen, const char *arg)
+uicb_focus_history(int screen, char *arg)
 {
     int i;
     FocusList *fl = globalconf.focus;
diff --git a/layout.c b/layout.c
index 2e832de28..67390b9e7 100644
--- a/layout.c
+++ b/layout.c
@@ -100,7 +100,7 @@ get_current_layout(int screen)
 }
 
 void
-uicb_client_focusnext(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_focusnext(int screen, char *arg __attribute__ ((unused)))
 {
     Client *c, *sel = globalconf.focus->client;
 
@@ -117,7 +117,7 @@ uicb_client_focusnext(int screen, const char *arg __attribute__ ((unused)))
 }
 
 void
-uicb_client_focusprev(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_focusprev(int screen, char *arg __attribute__ ((unused)))
 {
     Client *c, *sel = globalconf.focus->client;
 
@@ -225,7 +225,7 @@ saveawesomeprops(int screen)
 }
 
 void
-uicb_tag_setlayout(int screen, const char *arg)
+uicb_tag_setlayout(int screen, char *arg)
 {
     Layout *l = globalconf.screens[screen].layouts;
     Tag *tag;
@@ -278,7 +278,7 @@ maximize(int x, int y, int w, int h, int screen)
 }
 
 void
-uicb_client_togglemax(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_togglemax(int screen, char *arg __attribute__ ((unused)))
 {
     ScreenInfo *si = get_screen_info(globalconf.display, screen, &globalconf.screens[screen].statusbar, &globalconf.screens[screen].padding);
 
@@ -290,7 +290,7 @@ uicb_client_togglemax(int screen, const char *arg __attribute__ ((unused)))
 }
 
 void
-uicb_client_toggleverticalmax(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_toggleverticalmax(int screen, char *arg __attribute__ ((unused)))
 {
     Client *sel = globalconf.focus->client;
     ScreenInfo *si = get_screen_info(globalconf.display, screen, &globalconf.screens[screen].statusbar, &globalconf.screens[screen].padding);
@@ -306,7 +306,7 @@ uicb_client_toggleverticalmax(int screen, const char *arg __attribute__ ((unused
 
 
 void
-uicb_client_togglehorizontalmax(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_togglehorizontalmax(int screen, char *arg __attribute__ ((unused)))
 {
     Client *sel = globalconf.focus->client;
     ScreenInfo *si = get_screen_info(globalconf.display, screen, &globalconf.screens[screen].statusbar, &globalconf.screens[screen].padding);
@@ -321,8 +321,7 @@ uicb_client_togglehorizontalmax(int screen, const char *arg __attribute__ ((unus
 }
 
 void
-uicb_client_zoom(int screen,
-                 const char *arg __attribute__ ((unused)))
+uicb_client_zoom(int screen, char *arg __attribute__ ((unused)))
 {
     Client *sel = globalconf.focus->client;
 
diff --git a/layouts/tile.c b/layouts/tile.c
index 2d3a8a076..e2a771bd7 100644
--- a/layouts/tile.c
+++ b/layouts/tile.c
@@ -31,7 +31,7 @@
 extern awesome_config globalconf;
 
 void
-uicb_tag_setnmaster(int screen, const char * arg)
+uicb_tag_setnmaster(int screen, char * arg)
 {
     Tag *curtag = get_current_tag(screen);
     Layout *curlay = curtag->layout;
@@ -46,7 +46,7 @@ uicb_tag_setnmaster(int screen, const char * arg)
 }
 
 void
-uicb_tag_setncol(int screen, const char * arg)
+uicb_tag_setncol(int screen, char * arg)
 {
     Tag *curtag = get_current_tag(screen);
     Layout *curlay = curtag->layout;
@@ -61,7 +61,7 @@ uicb_tag_setncol(int screen, const char * arg)
 }
 
 void
-uicb_tag_setmwfact(int screen, const char *arg)
+uicb_tag_setmwfact(int screen, char *arg)
 {
     char *newarg;
     Tag *curtag = get_current_tag(screen);
diff --git a/mouse.c b/mouse.c
index 88ac1fd5f..20d4429fe 100644
--- a/mouse.c
+++ b/mouse.c
@@ -31,7 +31,7 @@
 extern awesome_config globalconf;
 
 void
-uicb_client_movemouse(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_movemouse(int screen, char *arg __attribute__ ((unused)))
 {
     int x1, y1, ocx, ocy, di, nx, ny;
     unsigned int dui;
@@ -45,7 +45,7 @@ uicb_client_movemouse(int screen, const char *arg __attribute__ ((unused)))
 
     if((get_current_layout(screen)->arrange != layout_floating)
         && !c->isfloating)
-         uicb_client_togglefloating(screen, "DUMMY");
+         uicb_client_togglefloating(screen, NULL);
      else
          restack(screen);
 
@@ -94,7 +94,7 @@ uicb_client_movemouse(int screen, const char *arg __attribute__ ((unused)))
 }
 
 void
-uicb_client_resizemouse(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_resizemouse(int screen, char *arg __attribute__ ((unused)))
 {
     int ocx, ocy, nw, nh;
     XEvent ev;
@@ -105,7 +105,7 @@ uicb_client_resizemouse(int screen, const char *arg __attribute__ ((unused)))
 
     if((get_current_layout(screen)->arrange != layout_floating)
        && !c->isfloating)
-        uicb_client_togglefloating(screen, "DUMMY");
+        uicb_client_togglefloating(screen, NULL);
     else
         restack(screen);
 
diff --git a/screen.c b/screen.c
index 25870ff3e..b4eb38e73 100644
--- a/screen.c
+++ b/screen.c
@@ -248,7 +248,7 @@ move_mouse_pointer_to_screen(Display *disp, int screen)
  * \ingroup ui_callback
  */
 void
-uicb_screen_focus(int screen, const char *arg)
+uicb_screen_focus(int screen, char *arg)
 {
     int new_screen, numscreens = get_screen_count(globalconf.display);
 
@@ -275,7 +275,7 @@ uicb_screen_focus(int screen, const char *arg)
  * \ingroup ui_callback
  */
 void
-uicb_client_movetoscreen(int screen __attribute__ ((unused)), const char *arg)
+uicb_client_movetoscreen(int screen __attribute__ ((unused)), char *arg)
 {
     int new_screen, prev_screen;
     Client *sel = globalconf.focus->client;
diff --git a/statusbar.c b/statusbar.c
index 89751a70d..fa9ffbf17 100644
--- a/statusbar.c
+++ b/statusbar.c
@@ -186,7 +186,7 @@ statusbar_get_position_from_str(const char * pos)
 }
 
 void
-uicb_statusbar_toggle(int screen, const char *arg __attribute__ ((unused)))
+uicb_statusbar_toggle(int screen, char *arg __attribute__ ((unused)))
 {
     if(globalconf.screens[screen].statusbar.position == BarOff)
         globalconf.screens[screen].statusbar.position = (globalconf.screens[screen].statusbar.dposition == BarOff) ? BarTop : globalconf.screens[screen].statusbar.dposition;
@@ -197,7 +197,7 @@ uicb_statusbar_toggle(int screen, const char *arg __attribute__ ((unused)))
 }
 
 void
-uicb_statusbar_set_position(int screen, const char *arg)
+uicb_statusbar_set_position(int screen, char *arg)
 {
     globalconf.screens[screen].statusbar.dposition = 
         globalconf.screens[screen].statusbar.position =
@@ -206,7 +206,7 @@ uicb_statusbar_set_position(int screen, const char *arg)
 }
 
 void
-uicb_statusbar_set_text(int screen, const char *arg)
+uicb_statusbar_set_text(int screen, char *arg)
 {
     if(!arg)
         return;
diff --git a/tag.c b/tag.c
index f970c34f1..b40392160 100644
--- a/tag.c
+++ b/tag.c
@@ -139,7 +139,7 @@ tag_client_with_rules(Client *c)
  * \ingroup ui_callback
  */
 void
-uicb_client_tag(int screen, const char *arg)
+uicb_client_tag(int screen, char *arg)
 {
     int tag_id = -1;
     Tag *tag, *target_tag;
@@ -176,7 +176,7 @@ uicb_client_tag(int screen, const char *arg)
  * \ingroup ui_callback
  */
 void
-uicb_client_togglefloating(int screen, const char *arg __attribute__ ((unused)))
+uicb_client_togglefloating(int screen, char *arg __attribute__ ((unused)))
 {
     Client *sel = globalconf.focus->client;
     
@@ -199,7 +199,7 @@ uicb_client_togglefloating(int screen, const char *arg __attribute__ ((unused)))
  * \ingroup ui_callback
  */
 void
-uicb_client_toggletag(int screen, const char *arg)
+uicb_client_toggletag(int screen, char *arg)
 {
     Client *sel = globalconf.focus->client;
     int i;
@@ -244,7 +244,7 @@ uicb_client_toggletag(int screen, const char *arg)
  * \ingroup ui_callback
  */
 void
-uicb_tag_toggleview(int screen, const char *arg)
+uicb_tag_toggleview(int screen, char *arg)
 {
     int i;
     Tag *tag, *target_tag;
@@ -276,7 +276,7 @@ uicb_tag_toggleview(int screen, const char *arg)
  * \ingroup ui_callback
  */
 void
-uicb_tag_view(int screen, const char *arg)
+uicb_tag_view(int screen, char *arg)
 {
     int i;
     Tag *tag, *target_tag;
@@ -306,7 +306,7 @@ uicb_tag_view(int screen, const char *arg)
  * \ingroup ui_callback
  */
 void
-uicb_tag_prev_selected(int screen, const char *arg __attribute__ ((unused)))
+uicb_tag_prev_selected(int screen, char *arg __attribute__ ((unused)))
 {
     Tag *tag;
     Bool t;
@@ -325,7 +325,7 @@ uicb_tag_prev_selected(int screen, const char *arg __attribute__ ((unused)))
  * \ingroup ui_callback
  */
 void
-uicb_tag_viewnext(int screen, const char *arg __attribute__ ((unused)))
+uicb_tag_viewnext(int screen, char *arg __attribute__ ((unused)))
 {
     Tag *curtag = get_current_tag(screen);
 
@@ -344,7 +344,7 @@ uicb_tag_viewnext(int screen, const char *arg __attribute__ ((unused)))
  * \ingroup ui_callback
  */
 void
-uicb_tag_viewprev(int screen, const char *arg __attribute__ ((unused)))
+uicb_tag_viewprev(int screen, char *arg __attribute__ ((unused)))
 {
     Tag *tag, *curtag = get_current_tag(screen);
 
diff --git a/xutil.c b/xutil.c
index 168b26572..9e670d097 100644
--- a/xutil.c
+++ b/xutil.c
@@ -31,7 +31,7 @@
 extern awesome_config globalconf;
 
 void
-uicb_exec(int screen __attribute__ ((unused)), const char *arg)
+uicb_exec(int screen __attribute__ ((unused)), char *arg)
 {
     char path[PATH_MAX];
     if(globalconf.display)
@@ -42,7 +42,7 @@ uicb_exec(int screen __attribute__ ((unused)), const char *arg)
 }
 
 void
-uicb_spawn(int screen, const char *arg)
+uicb_spawn(int screen, char *arg)
 {
     static char *shell = NULL;
     char *display = NULL;