diff --git a/ewmh.c b/ewmh.c
index ad8891591..fabfaf5c9 100644
--- a/ewmh.c
+++ b/ewmh.c
@@ -47,6 +47,7 @@ static Atom net_wm_window_type;
 static Atom net_wm_window_type_normal;
 static Atom net_wm_window_type_dock;
 static Atom net_wm_window_type_splash;
+static Atom net_wm_window_type_dialog;
 static Atom net_wm_icon;
 static Atom net_wm_state;
 static Atom net_wm_state_sticky;
@@ -78,6 +79,7 @@ static AtomItem AtomNames[] =
     { "_NET_WM_WINDOW_TYPE_NORMAL", &net_wm_window_type_normal },
     { "_NET_WM_WINDOW_TYPE_DOCK", &net_wm_window_type_dock },
     { "_NET_WM_WINDOW_TYPE_SPLASH", &net_wm_window_type_splash },
+    { "_NET_WM_WINDOW_TYPE_DIALOG", &net_wm_window_type_dialog },
     { "_NET_WM_ICON", &net_wm_icon },
     { "_NET_WM_STATE", &net_wm_state },
     { "_NET_WM_STATE_STICKY", &net_wm_state_sticky },
@@ -128,6 +130,7 @@ ewmh_set_supported_hints(int phys_screen)
     atom[i++] = net_wm_window_type_normal;
     atom[i++] = net_wm_window_type_dock;
     atom[i++] = net_wm_window_type_splash;
+    atom[i++] = net_wm_window_type_dialog;
     atom[i++] = net_wm_icon;
     atom[i++] = net_wm_state;
     atom[i++] = net_wm_state_sticky;
@@ -273,7 +276,7 @@ ewmh_process_window_type_atom(Client *c, Atom state)
 {
     if(state == net_wm_window_type_normal)
     {
-        /* do nothing */
+        /* do nothing. this is REALLY IMPORTANT */
     }
     else if(state == net_wm_window_type_dock
             || state == net_wm_window_type_splash)
@@ -283,6 +286,8 @@ ewmh_process_window_type_atom(Client *c, Atom state)
         c->isfixed = True;
         c->isfloating = True;
     }
+    else if (state == net_wm_window_type_dialog)
+        c->isfloating = True;
 }
 void
 ewmh_process_client_message(XClientMessageEvent *ev)