diff --git a/openbsc/tests/gsm0408/gsm0408_test.c b/openbsc/tests/gsm0408/gsm0408_test.c
index 692ec90..781ef61 100644
--- a/openbsc/tests/gsm0408/gsm0408_test.c
+++ b/openbsc/tests/gsm0408/gsm0408_test.c
@@ -48,7 +48,7 @@
 #define VERIFY(res, cmp, wanted)					\
 	if (!(res cmp wanted)) {					\
 		printf("ASSERT failed: %s:%d Wanted: %d %s %d\n",	\
-			__FILE__, __LINE__, res, # cmp, wanted);	\
+			__FILE__, __LINE__, (int) res, # cmp, (int) wanted);	\
 	}