diff --git a/libs/sysplugins/smarty_cacheresource_keyvaluestore.php b/libs/sysplugins/smarty_cacheresource_keyvaluestore.php
index b6dcf26c..93abf4d7 100644
--- a/libs/sysplugins/smarty_cacheresource_keyvaluestore.php
+++ b/libs/sysplugins/smarty_cacheresource_keyvaluestore.php
@@ -178,7 +178,7 @@ abstract class Smarty_CacheResource_KeyValueStore extends Smarty_CacheResource {
                 $uid = $tpl->source->uid;
              }
             // remove from template cache
-            unset($smarty->template_objects[sha1(join(DIRECTORY_SEPARATOR, $smarty->getTemplateDir()),$tpl->template_resource . $tpl->cache_id . $tpl->compile_id)]);
+            unset($smarty->template_objects[sha1(join(DIRECTORY_SEPARATOR, $smarty->getTemplateDir()) . $tpl->template_resource . $tpl->cache_id . $tpl->compile_id)]);
         }
         return $uid . '#' . $this->sanitize($resource_name) . '#' . $this->sanitize($cache_id) . '#' . $this->sanitize($compile_id);
     }