diff --git a/ext/x264/gstx264enc.c b/ext/x264/gstx264enc.c
index 098b41f0a8..59d1f4e72b 100644
--- a/ext/x264/gstx264enc.c
+++ b/ext/x264/gstx264enc.c
@@ -1466,7 +1466,7 @@ gst_x264_enc_sink_get_caps (GstPad * pad)
 
   /* If we already have caps return them */
   if (GST_PAD_CAPS (pad))
-    return GST_PAD_CAPS (pad);
+    return gst_caps_copy (GST_PAD_CAPS (pad));
 
   encoder = GST_X264_ENC (gst_pad_get_parent (pad));
   if (!encoder)