diff --git a/hello.c b/hello.c
index 1b70430..a8c484d 100644
--- a/hello.c
+++ b/hello.c
@@ -2,5 +2,5 @@
 int main(int argc, char* argv[])
 {
 	printf("hello, %s\n", argv[1]);
-	return 0;
+	return -1;
 }