diff --git a/src/ap/gas_serv.c b/src/ap/gas_serv.c
index 95f0a667e..96cd7030a 100644
--- a/src/ap/gas_serv.c
+++ b/src/ap/gas_serv.c
@@ -691,7 +691,7 @@ static void anqp_add_osu_provider(struct wpabuf *buf,
 
 	/* OSU Method List */
 	count = wpabuf_put(buf, 1);
-	for (i = 0; p->method_list[i] >= 0; i++)
+	for (i = 0; p->method_list && p->method_list[i] >= 0; i++)
 		wpabuf_put_u8(buf, p->method_list[i]);
 	*count = i;