diff --git a/gst/gstmessage.h b/gst/gstmessage.h
index 68213ebd1f..7ad471daf1 100644
--- a/gst/gstmessage.h
+++ b/gst/gstmessage.h
@@ -162,7 +162,7 @@ typedef enum
   GST_MESSAGE_STREAM_START      = (1 << 28),
   GST_MESSAGE_NEED_CONTEXT      = (1 << 29),
   GST_MESSAGE_HAVE_CONTEXT      = (1 << 30),
-  GST_MESSAGE_EXTENDED          = (1 << 31),
+  GST_MESSAGE_EXTENDED          = (gint) (1u << 31),
   GST_MESSAGE_DEVICE_ADDED      = GST_MESSAGE_EXTENDED + 1,
   GST_MESSAGE_DEVICE_REMOVED    = GST_MESSAGE_EXTENDED + 2,
   GST_MESSAGE_PROPERTY_NOTIFY   = GST_MESSAGE_EXTENDED + 3,