diff --git a/library/Icinga/Data/Filter/FilterExpression.php b/library/Icinga/Data/Filter/FilterExpression.php
index 87cd73392..743c8cb4b 100644
--- a/library/Icinga/Data/Filter/FilterExpression.php
+++ b/library/Icinga/Data/Filter/FilterExpression.php
@@ -192,7 +192,7 @@ class FilterExpression extends Filter
 
         $parts = array();
         foreach (preg_split('~\*~', $expression) as $part) {
-            $parts[] = preg_quote($part);
+            $parts[] = preg_quote($part, '/');
         }
         $pattern = '/^' . implode('.*', $parts) . '$/';