diff --git a/gst/playback/gstdecodebin2.c b/gst/playback/gstdecodebin2.c
index 43f6a8b80b..a4148ef662 100644
--- a/gst/playback/gstdecodebin2.c
+++ b/gst/playback/gstdecodebin2.c
@@ -929,6 +929,8 @@ gst_decode_bin_class_init (GstDecodeBinClass * klass)
 
   gstbin_klass->handle_message =
       GST_DEBUG_FUNCPTR (gst_decode_bin_handle_message);
+
+  g_type_class_ref (GST_TYPE_DECODE_PAD);
 }
 
 gint
diff --git a/gst/playback/gstplaysink.c b/gst/playback/gstplaysink.c
index 9ad0603df6..36fc5da080 100644
--- a/gst/playback/gstplaysink.c
+++ b/gst/playback/gstplaysink.c
@@ -627,6 +627,9 @@ gst_play_sink_class_init (GstPlaySinkClass * klass)
 
   _playsink_reset_segment_event_marker_id =
       g_quark_from_static_string ("gst-playsink-reset-segment-event-marker");
+
+  g_type_class_ref (GST_TYPE_STREAM_SYNCHRONIZER);
+  g_type_class_ref (GST_TYPE_COLOR_BALANCE_CHANNEL);
 }
 
 static void