diff --git a/glib/gqsort.c b/glib/gqsort.c
index 9463124a7..6e1b225bc 100644
--- a/glib/gqsort.c
+++ b/glib/gqsort.c
@@ -302,5 +302,5 @@ g_qsort_with_data (gconstpointer    pbase,
                    GCompareDataFunc compare_func,
                    gpointer         user_data)
 {
-  return msort_r (pbase, total_elems, size, compare_func, user_data);
+  return msort_r ((gpointer)pbase, total_elems, size, compare_func, user_data);
 }