diff --git a/src/DrupalMemcached.php b/src/DrupalMemcached.php
old mode 100644
new mode 100755
index 7201b0bf80590bdaddc07910dad606d5938c00fd..3f636bc0c5dc550e1ce55562f526d49a06afdeae
--- a/src/DrupalMemcached.php
+++ b/src/DrupalMemcached.php
@@ -48,7 +48,7 @@ class DrupalMemcached extends DrupalMemcacheBase {
 
     if ($host == 'unix') {
       // Memcached expects just the path to the socket without the protocol
-      $host = substr($host, 7);
+      $host = substr($server_path, 7);
       // Port is always 0 for unix sockets.
       $port = 0;
     }