diff --git a/CloudObjects/SDK/ObjectRetriever.php b/CloudObjects/SDK/ObjectRetriever.php
index 29b18a0..6b4cfd5 100644
--- a/CloudObjects/SDK/ObjectRetriever.php
+++ b/CloudObjects/SDK/ObjectRetriever.php
@@ -112,14 +112,18 @@ class ObjectRetriever implements CustomCacheAndLogInterface {
 			$this->logger->info($message, [ 'elapsed_ms' => round((microtime(true) - $ts) * 1000) ]);
 	}
 
+	private function getCacheKey($id) {
+		return $this->options['cache_prefix'].$this->options['auth_ns'].'/'.$id;		
+	}
+
 	private function getFromCache($id) {
-		return (isset($this->cache) && $this->cache->contains($this->options['cache_prefix'].$id))
-			? $this->cache->fetch($this->options['cache_prefix'].$this->options['auth_ns'].'/'.$id) : null;
+		return (isset($this->cache) && $this->cache->contains($this->getCacheKey($id)))
+			? $this->cache->fetch($this->getCacheKey($id)) : null;
 	}
 
 	private function putIntoCache($id, $data, $ttl) {
 		if (isset($this->cache))
-			$this->cache->save($this->options['cache_prefix'].$this->options['auth_ns'].'/'.$id, $data, $ttl);
+			$this->cache->save($this->getCacheKey($id), $data, $ttl);
 	}
 
 	public function getFromCacheCustom($id) {