diff --git a/openbsc/include/openbsc/mncc.h b/openbsc/include/openbsc/mncc.h
index 2fc8e0b..9a9648d 100644
--- a/openbsc/include/openbsc/mncc.h
+++ b/openbsc/include/openbsc/mncc.h
@@ -27,6 +27,8 @@
 #include <osmocore/linuxlist.h>
 #include <osmocore/mncc.h>
 
+#include <stdint.h>
+
 struct gsm_network;
 struct msgb;
 
@@ -39,9 +41,9 @@
 	void *net;
 
 	/* the 'local' transaction */
-	u_int32_t callref;
+	uint32_t callref;
 	/* the 'remote' transaction */
-	u_int32_t remote_ref;
+	uint32_t remote_ref;
 };
 
 #define MNCC_SETUP_REQ		0x0101
@@ -115,11 +117,11 @@
 
 struct gsm_mncc {
 	/* context based information */
-	u_int32_t	msg_type;
-	u_int32_t	callref;
+	uint32_t	msg_type;
+	uint32_t	callref;
 
 	/* which fields are present */
-	u_int32_t	fields;
+	uint32_t	fields;
 
 	/* data derived informations (MNCC_F_ based) */
 	struct gsm_mncc_bearer_cap	bearer_cap;
@@ -150,8 +152,8 @@
 };
 
 struct gsm_data_frame {
-	u_int32_t	msg_type;
-	u_int32_t	callref;
+	uint32_t	msg_type;
+	uint32_t	callref;
 	unsigned char	data[0];
 };