diff --git a/lib/cache/apc.php b/lib/cache/apc.php
index f814afbe494..b1ce87f5267 100644
--- a/lib/cache/apc.php
+++ b/lib/cache/apc.php
@@ -44,3 +44,11 @@ class OC_Cache_APC {
 		}
 	}
 }
+if(!function_exists('apc_exists')) {
+	function apc_exists($keys)
+	{
+		$result;
+		apc_fetch($keys, $result);
+		return $result;
+	}
+}