diff --git a/include/osmocore/gsm48.h b/include/osmocore/gsm48.h
index b752ee0..e3a1def 100644
--- a/include/osmocore/gsm48.h
+++ b/include/osmocore/gsm48.h
@@ -16,6 +16,6 @@
 
 /* Convert Mobile Identity (10.5.1.4) to string */
 int gsm48_mi_to_string(char *string, const int str_len,
-			const u_int8_t *mi, const int mi_len);
+			const uint8_t *mi, const int mi_len);
 
 #endif