diff --git a/src/mod/languages/mod_spidermonkey/mod_spidermonkey.c b/src/mod/languages/mod_spidermonkey/mod_spidermonkey.c
index a31157fb60..0cb7d7b468 100644
--- a/src/mod/languages/mod_spidermonkey/mod_spidermonkey.c
+++ b/src/mod/languages/mod_spidermonkey/mod_spidermonkey.c
@@ -1710,9 +1710,10 @@ static JSBool session_sleep(JSContext * cx, JSObject * obj, uintN argc, jsval *
 
 	if (argc > 0) {
 		JS_ValueToInt32(cx, argv[0], &ms);
-		if (ms <= 0) {
-			return JS_FALSE;
-		}
+	}
+
+	if (ms <= 0) {
+		return JS_FALSE;
 	}
 
 	if (argc > 1) {