diff --git a/gst/videoparsers/gsth263parse.c b/gst/videoparsers/gsth263parse.c
index 454e84b5de..9b12997fa9 100644
--- a/gst/videoparsers/gsth263parse.c
+++ b/gst/videoparsers/gsth263parse.c
@@ -277,6 +277,8 @@ gst_h263_parse_set_src_caps (GstH263Parse * h263parse,
 
   gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (GST_BASE_PARSE (h263parse)), caps);
   gst_caps_unref (caps);
+  if (sink_caps)
+    gst_caps_unref (sink_caps);
 }
 
 static GstFlowReturn