diff --git a/app/music_on_hold/resources/classes/switch_music_on_hold.php b/app/music_on_hold/resources/classes/switch_music_on_hold.php
index 268695905a..a83296d6fd 100644
--- a/app/music_on_hold/resources/classes/switch_music_on_hold.php
+++ b/app/music_on_hold/resources/classes/switch_music_on_hold.php
@@ -192,8 +192,8 @@ include "root.php";
 					$default_moh_prefix = 'music';
 				}
 			//replace the variables
-				$file_contents = preg_replace("music\/default", $default_moh_prefix, $file_contents);
-				$file_contents = preg_replace("[\t ]*(?:<!--)?{v_moh_categories}(?:-->)?", $this->xml, $file_contents);
+				$file_contents = preg_replace("/music\/default/", $default_moh_prefix, $file_contents);
+				$file_contents = preg_replace("/[\t ]*(?:<!--)?{v_moh_categories}(?:-->)?/", $this->xml, $file_contents);
 
 			//write the XML config file
 				$fout = fopen($_SESSION['switch']['conf']['dir']."/autoload_configs/local_stream.conf.xml","w");
@@ -212,4 +212,4 @@ include "root.php";
 	//$moh->xml();
 	//$moh->save();
 
-?>
\ No newline at end of file
+?>