--- a/libnemo-private/nemo-action.c
+++ b/libnemo-private/nemo-action.c
@@ -1322,6 +1322,7 @@ check_gsettings_condition (NemoAction *a
         g_strfreev (split);
         return FALSE;
     }
+    return 0;
 }
 
 static gboolean
--- a/libnemo-private/nemo-desktop-utils.c
+++ b/libnemo-private/nemo-desktop-utils.c
@@ -82,15 +82,7 @@ nemo_desktop_utils_get_primary_monitor (
 #if GTK_CHECK_VERSION (3, 22, 0)
     ensure_display ();
 
-    gint n_mon = gdk_display_get_n_monitors (default_display);
-    gint i;
-
-    for (i = 0; i < n_mon; i ++) {
-        GdkMonitor *monitor = gdk_display_get_monitor (default_display, i);
-        if (gdk_monitor_is_primary (monitor)) {
-            return i;
-        }
-    }
+    return gdk_display_get_primary_monitor (default_display);
 #else
     ensure_screen ();
 
--- a/libnemo-private/nemo-monitor.c
+++ b/libnemo-private/nemo-monitor.c
@@ -78,6 +78,7 @@ schedule_call_consume_changes (void)
       call_consume_changes_idle_id =
           g_idle_add (call_consume_changes_idle_cb, NULL);
   }
+  return 0;
 }
 
 static void