diff --git a/lib/hours.php b/lib/hours.php
index 61aa5af7..0f06188e 100644
--- a/lib/hours.php
+++ b/lib/hours.php
@@ -1,7 +1,10 @@
 <?php
 
-if (isset($_GET["cleanCache"]))
+if (isset($_GET["cleanCache"])) {
 	$clean = $_GET["cleanCache"];
+} else {
+	$clean = 0;
+}
 
 $resetCache = 0;
 
@@ -1300,4 +1303,4 @@ function getExport($location) {
 		
 	$export = $arExport;
 	return $export;
-}
\ No newline at end of file
+}