diff --git a/gst/gstvalue.c b/gst/gstvalue.c
index 6643080ee1..cd95034ab0 100644
--- a/gst/gstvalue.c
+++ b/gst/gstvalue.c
@@ -2532,7 +2532,7 @@ gst_value_deserialize_int_helper (gint64 * to, const gchar * s,
 {
   gboolean ret = FALSE;
   gchar *end;
-  gint64 mask = -1;
+  guint64 mask = -1;
 
   errno = 0;
   *to = g_ascii_strtoull (s, &end, 0);