Index: xfce-exec.c
===================================================================
--- xfce-exec.c	(revision 26207)
+++ xfce-exec.c	(revision 26290)
@@ -122,19 +122,37 @@
 
     if (async)
     {
+        gchar **cur = NULL;
+
         spawn_flags = G_SPAWN_SEARCH_PATH;
         
         if (want_child_watch) 
         {
             spawn_flags |= G_SPAWN_DO_NOT_REAP_CHILD;
         }
-        
+
+	if (!free_envp)
+	  free_envp = g_strdupv (envp);
+
+	for (cur = free_envp; *cur; cur++)
+        {
+	    if ((strlen (*cur) > 7) && (g_strncasecmp ("DISPLAY", *cur, 7) == 0))
+            {
+	        gchar *dpyname = gdk_screen_make_display_name (screen);
+
+		g_free (*cur);
+		*cur = g_strconcat ("DISPLAY=", dpyname, NULL);
+
+		g_free (dpyname);
+	    }	  
+	}
+
         success = gdk_spawn_on_screen (screen, 
                                        NULL, argv, 
-                                       free_envp ? free_envp : envp,
-                                       spawn_flags, 
-                                       child_setup_async, NULL, &pid, 
-                                       error);
+				       free_envp,
+				       spawn_flags, 
+				       child_setup_async, NULL, &pid, 
+				       error);
     }
     else
     {