diff --git a/openbsc/src/libmsc/gsm_subscriber.c b/openbsc/src/libmsc/gsm_subscriber.c
index ff4a647..f0372af 100644
--- a/openbsc/src/libmsc/gsm_subscriber.c
+++ b/openbsc/src/libmsc/gsm_subscriber.c
@@ -266,7 +266,7 @@
 
 
 struct gsm_subscriber *subscr_get_by_tmsi(struct gsm_network *net,
-					  u_int32_t tmsi)
+					  uint32_t tmsi)
 {
 	char tmsi_string[14];
 	struct gsm_subscriber *subscr;