--- xfdesktop-4.10.0-orig/src/xfce-backdrop.c	2013-02-23 15:32:31.200317251 -0800
+++ xfdesktop-4.10.0/src/xfce-backdrop.c	2013-02-23 15:36:38.564007300 -0800
@@ -52,7 +52,7 @@
                                        guint property_id,
                                        GValue *value,
                                        GParamSpec *pspec);
-static void xfce_backdrop_timer(XfceBackdrop *backdrop);
+static gboolean xfce_backdrop_timer(XfceBackdrop *backdrop);
 
 struct _XfceBackdropPriv
 {
@@ -831,12 +831,14 @@
     return backdrop->priv->saturation;
 }
 
-static void
+static gboolean
 xfce_backdrop_timer(XfceBackdrop *backdrop)
 {
     g_return_if_fail(XFCE_IS_BACKDROP(backdrop));
 
     g_signal_emit(G_OBJECT(backdrop), backdrop_signals[BACKDROP_CYCLE], 0);
+
+    return TRUE;
 }
 
 /**