diff --git a/surf.c b/surf.c
index d43535d..5043d33 100644
--- a/surf.c
+++ b/surf.c
@@ -259,7 +259,8 @@ sigchld(int unused)
 {
 	if (signal(SIGCHLD, sigchld) == SIG_ERR)
 		die("Can't install SIGCHLD handler");
-	while (0 < waitpid(-1, NULL, WNOHANG));
+	while (waitpid(-1, NULL, WNOHANG) > 0)
+		;
 }
 
 char *