diff --git a/libs/gst/net/gstnetaddressmeta.c b/libs/gst/net/gstnetaddressmeta.c
index 05f3309627..d9f1ddd073 100644
--- a/libs/gst/net/gstnetaddressmeta.c
+++ b/libs/gst/net/gstnetaddressmeta.c
@@ -330,8 +330,7 @@ gst_net_address_equal (const GstNetAddress * naddr1,
  * Since: 0.10.24
  */
 gint
-gst_net_address_to_string (const GstNetAddress * naddr, gchar * dest,
-    gulong len)
+gst_net_address_to_string (const GstNetAddress * naddr, gchar * dest, gsize len)
 {
   gint result;
 
diff --git a/libs/gst/net/gstnetaddressmeta.h b/libs/gst/net/gstnetaddressmeta.h
index 34a8974fbd..03076f2b73 100644
--- a/libs/gst/net/gstnetaddressmeta.h
+++ b/libs/gst/net/gstnetaddressmeta.h
@@ -102,7 +102,7 @@ gint            gst_net_address_get_address_bytes (const GstNetAddress *naddr, g
 gboolean        gst_net_address_equal             (const GstNetAddress *naddr1,
                                                    const GstNetAddress *naddr2);
 
-gint            gst_net_address_to_string         (const GstNetAddress *naddr, gchar *dest, gulong len);
+gint            gst_net_address_to_string         (const GstNetAddress *naddr, gchar *dest, gsize len);
 
 G_END_DECLS