diff --git a/gst/isomp4/qtdemux.c b/gst/isomp4/qtdemux.c
index 846f28cfec..8ca345ffab 100644
--- a/gst/isomp4/qtdemux.c
+++ b/gst/isomp4/qtdemux.c
@@ -96,7 +96,7 @@
 
 #define QTDEMUX_TREE_NODE_FOURCC(n) (QT_FOURCC(((guint8 *) (n)->data) + 4))
 
-#define STREAM_IS_EOS(s) (s->time_position == GST_CLOCK_TIME_NONE)
+#define STREAM_IS_EOS(s) ((s)->time_position == GST_CLOCK_TIME_NONE)
 
 #define ABSDIFF(x, y) ( (x) > (y) ? ((x) - (y)) : ((y) - (x)) )