diff --git a/tests/auc/auc_test.c b/tests/auc/auc_test.c
index 6bf2eb2..61cf82f 100644
--- a/tests/auc/auc_test.c
+++ b/tests/auc/auc_test.c
@@ -509,7 +509,7 @@
 }
 
 /* Test a variety of invalid authentication data combinations */
-void test_gen_vectors_bad_args()
+void test_gen_vectors_bad_args(void)
 {
 	struct osmo_auth_vector vec;
 	uint8_t auts[14];
diff --git a/tests/auc/gen_ts_55_205_test_sets/main_template.c b/tests/auc/gen_ts_55_205_test_sets/main_template.c
index 509416a..ffdfa78 100644
--- a/tests/auc/gen_ts_55_205_test_sets/main_template.c
+++ b/tests/auc/gen_ts_55_205_test_sets/main_template.c
@@ -100,7 +100,7 @@
 
 FUNCTIONS
 
-int main()
+int main(int argc, char **argv)
 {
 	printf("3GPP TS 55.205 Test Sets\n");
 	void *tall_ctx = talloc_named_const(NULL, 1, "test");