diff --git a/gst/avi/gstavidemux.c b/gst/avi/gstavidemux.c
index 5e4c1be984..c2741e32bf 100644
--- a/gst/avi/gstavidemux.c
+++ b/gst/avi/gstavidemux.c
@@ -4417,9 +4417,10 @@ swap_line (guint8 * d1, guint8 * d2, guint8 * tmp, gint bytes)
 
 
 #define gst_avi_demux_is_uncompressed(fourcc)		\
-  (fourcc == GST_RIFF_DIB ||				\
-   fourcc == GST_RIFF_rgb ||				\
-   fourcc == GST_RIFF_RGB || fourcc == GST_RIFF_RAW)
+  (fourcc &&						\
+    (fourcc == GST_RIFF_DIB ||				\
+     fourcc == GST_RIFF_rgb ||				\
+     fourcc == GST_RIFF_RGB || fourcc == GST_RIFF_RAW))
 
 /*
  * Invert DIB buffers... Takes existing buffer and