diff --git a/classes/cache/CacheApc.class.php b/classes/cache/CacheApc.class.php
index 73abeb0b3..b8499d7a6 100644
--- a/classes/cache/CacheApc.class.php
+++ b/classes/cache/CacheApc.class.php
@@ -84,7 +84,7 @@ class CacheApc extends CacheBase
 
 		if($modified_time > 0 && $modified_time > $obj[0])
 		{
-			$this->delete($_key);
+			$this->delete($key);
 			return false;
 		}
 
@@ -110,7 +110,7 @@ class CacheApc extends CacheBase
 
 		if($modified_time > 0 && $modified_time > $obj[0])
 		{
-			$this->delete($_key);
+			$this->delete($key);
 			return false;
 		}
 
@@ -125,7 +125,8 @@ class CacheApc extends CacheBase
 	 */
 	function delete($key)
 	{
-		return apc_delete($key);
+		$_key = md5(_XE_PATH_ . $key);
+		return apc_delete($_key);
 	}
 
 	/**