diff --git a/client.c b/client.c
index bf25b05f6..c2bb5e7cc 100644
--- a/client.c
+++ b/client.c
@@ -218,7 +218,7 @@ client_swap(Client *c1, Client *c2)
 /** Attach client to the beginning of the clients stack
  * \param c the client
  */
-inline void
+void
 attach(Client * c)
 {
     if(clients)
@@ -227,7 +227,7 @@ attach(Client * c)
     clients = c;
 }
 
-inline void
+void
 updatetitle(Client * c)
 {
     if(!xgettextprop(c->display, c->win, XInternAtom(c->display, "_NET_WM_NAME", False), c->name, sizeof c->name))
diff --git a/client.h b/client.h
index 679daeae8..c20debd9e 100644
--- a/client.h
+++ b/client.h
@@ -62,7 +62,7 @@ struct Client
     Bool ftview;
 };
 
-void attach(Client *);          /* attaches c to global client list */
+inline void attach(Client *);          /* attaches c to global client list */
 void ban(Client *);             /* bans c */
 void configure(Client *);       /* send synthetic configure event */
 void detach(Client *);          /* detaches c from global client list */
@@ -71,7 +71,7 @@ void manage(Display *, DC *, Window, XWindowAttributes *, awesome_config *);
 void resize(Client *, int, int, int, int, awesome_config *, Bool);        /* resize with given coordinates c */
 void unban(Client *);           /* unbans c */
 void unmanage(Client *, DC *, long, awesome_config *);  /* unmanage c */
-void updatesizehints(Client *); /* update the size hint variables of c */
+inline void updatesizehints(Client *); /* update the size hint variables of c */
 void updatetitle(Client *);     /* update the name of c */
 void saveprops(Client * c, int);     /* saves client properties */
 void set_shape(Client *);