diff --git a/object-cache.php b/object-cache.php
index 05c6526..1093451 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -1256,7 +1256,7 @@ public function build_client_parameters( $redis_server ) {
 			}
 		}
 
-		if ( file_exists( $redis_server['host'] ) && 'socket' === filetype( $redis_server['host'] ) ) { // unix socket connection.
+		if (strpos($redis_server['host'], 'unix:///') === 0) { // Unix socket connection. 
 			// port must be null or socket won't connect.
 			$port = null;
 		} else { // tcp connection.