diff --git a/lib/private/Memcache/Memcached.php b/lib/private/Memcache/Memcached.php
index d02b62edb0e4..123e48f6b2eb 100644
--- a/lib/private/Memcache/Memcached.php
+++ b/lib/private/Memcache/Memcached.php
@@ -109,7 +109,9 @@ public function set($key, $value, $ttl = 0) {
 		} else {
 			$result = self::$cache->set($this->getNamespace() . $key, $value);
 		}
-		$this->verifyReturnCode();
+		if ($result !== true) {
+			$this->verifyReturnCode();
+		}
 		return $result;
 	}