diff --git a/gst/debugutils/gstfakeaudiosink.c b/gst/debugutils/gstfakeaudiosink.c
index ef736eb243..5b962a2159 100644
--- a/gst/debugutils/gstfakeaudiosink.c
+++ b/gst/debugutils/gstfakeaudiosink.c
@@ -62,6 +62,18 @@ G_DEFINE_TYPE_WITH_CODE (GstFakeAudioSink, gst_fake_audio_sink, GST_TYPE_BIN,
 GST_ELEMENT_REGISTER_DEFINE (fakeaudiosink, "fakeaudiosink",
     GST_RANK_NONE, gst_fake_audio_sink_get_type ());
 
+static void
+gst_fake_audio_sink_proxy_properties (GstFakeAudioSink * self,
+    GstElement * child)
+{
+  static gsize initialized = 0;
+
+  if (g_once_init_enter (&initialized)) {
+    gst_fake_sink_proxy_properties (GST_ELEMENT_CAST (self), child, PROP_LAST);
+    g_once_init_leave (&initialized, 1);
+  }
+}
+
 static void
 gst_fake_audio_sink_init (GstFakeAudioSink * self)
 {
@@ -89,7 +101,7 @@ gst_fake_audio_sink_init (GstFakeAudioSink * self)
 
     self->child = child;
 
-    gst_fake_sink_proxy_properties (GST_ELEMENT_CAST (self), child, PROP_LAST);
+    gst_fake_audio_sink_proxy_properties (self, child);
   } else {
     g_warning ("Check your GStreamer installation, "
         "core element 'fakesink' is missing.");
diff --git a/gst/debugutils/gstfakevideosink.c b/gst/debugutils/gstfakevideosink.c
index 837a765845..571c20a338 100644
--- a/gst/debugutils/gstfakevideosink.c
+++ b/gst/debugutils/gstfakevideosink.c
@@ -127,6 +127,18 @@ gst_fake_video_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
   return TRUE;
 }
 
+static void
+gst_fake_video_sink_proxy_properties (GstFakeVideoSink * self,
+    GstElement * child)
+{
+  static gsize initialized = 0;
+
+  if (g_once_init_enter (&initialized)) {
+    gst_fake_sink_proxy_properties (GST_ELEMENT_CAST (self), child, PROP_LAST);
+    g_once_init_leave (&initialized, 1);
+  }
+}
+
 static void
 gst_fake_video_sink_init (GstFakeVideoSink * self)
 {
@@ -157,7 +169,7 @@ gst_fake_video_sink_init (GstFakeVideoSink * self)
 
     self->child = child;
 
-    gst_fake_sink_proxy_properties (GST_ELEMENT_CAST (self), child, PROP_LAST);
+    gst_fake_video_sink_proxy_properties (self, child);
   } else {
     g_warning ("Check your GStreamer installation, "
         "core element 'fakesink' is missing.");