diff --git a/qa/kern/fork_chain.c b/qa/kern/fork_chain.c
index 8e28ebc..d5b0f8b 100644
--- a/qa/kern/fork_chain.c
+++ b/qa/kern/fork_chain.c
@@ -37,7 +37,7 @@ static void
 donothing(void)
 {
 	int i = 0;
-	while(i < 100)
+	while(++i < 100)
 		sleep(3000);
 	exits(nil);
 }