diff --git a/gst/qtdemux/qtdemux.c b/gst/qtdemux/qtdemux.c
index d09cb6f944..4b5f431b37 100644
--- a/gst/qtdemux/qtdemux.c
+++ b/gst/qtdemux/qtdemux.c
@@ -1371,7 +1371,7 @@ extract_initial_length_and_fourcc (guint8 * data, guint64 * plength,
   guint32 fourcc;
 
   length = QT_UINT32 (data);
-  GST_DEBUG ("length %08" G_GINT64_MODIFIER "x", length);
+  GST_DEBUG ("length 0x%08" G_GINT64_MODIFIER "x", length);
   fourcc = QT_FOURCC (data + 4);
   GST_DEBUG ("atom type %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));
 
@@ -1381,7 +1381,7 @@ extract_initial_length_and_fourcc (guint8 * data, guint64 * plength,
     /* this means we have an extended size, which is the 64 bit value of
      * the next 8 bytes */
     length = QT_UINT64 (data + 8);
-    GST_DEBUG ("length %08llx", length);
+    GST_DEBUG ("length 0x%08" G_GINT64_MODIFIER "x", length);
   }
 
   if (plength)