diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
index bf822d10e7b..b0a7ce338a7 100644
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -2555,7 +2555,7 @@ coredump(struct thread *td)
 	limit = p->p_rlimit[RLIMIT_CORE].rlim_cur;
 	if (limit == 0) {
 		PROC_UNLOCK(p);
-		return 0;
+		return EFBIG;
 	}
 	PROC_UNLOCK(p);