--- a/tests/tests_libcrun_fuzzer.c
+++ b/tests/tests_libcrun_fuzzer.c
@@ -463,7 +463,7 @@ LLVMFuzzerTestOneInput (uint8_t *buf, si
 }
 
 static void
-sig_chld ()
+sig_chld (int i)
 {
   int status;
   pid_t p;
