diff --git a/gst/isomp4/qtdemux.c b/gst/isomp4/qtdemux.c
index 8732f1edb3..613edad576 100644
--- a/gst/isomp4/qtdemux.c
+++ b/gst/isomp4/qtdemux.c
@@ -3885,6 +3885,9 @@ gst_qtdemux_clip_buffer (GstQTDemux * qtdemux, QtDemuxStream * stream,
   } else
     goto wrong_type;
 
+  if (frame_size <= 0)
+    goto bad_frame_size;
+
   /* we can only clip if we have a valid pts */
   pts = GST_BUFFER_PTS (buf);
   if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (pts)))
@@ -3953,6 +3956,11 @@ wrong_type:
     GST_DEBUG_OBJECT (qtdemux, "unknown stream type");
     return buf;
   }
+bad_frame_size:
+  {
+    GST_DEBUG_OBJECT (qtdemux, "bad frame size");
+    return buf;
+  }
 no_pts:
   {
     GST_DEBUG_OBJECT (qtdemux, "no pts on buffer");