diff --git a/app/access_controls/app_defaults.php b/app/access_controls/app_defaults.php
index fa495a4e0f..780bbf3cfc 100644
--- a/app/access_controls/app_defaults.php
+++ b/app/access_controls/app_defaults.php
@@ -129,10 +129,12 @@
 					unset($prep_statement);
 
 				//rename the file
-					rename($xml_dir.'/acl.conf.xml', $xml_dir.'/acl.conf');
+					if (file_exists($xml_dir.'/acl.conf.xml') {
+						rename($xml_dir.'/acl.conf.xml', $xml_dir.'/acl.conf');
+					}
 			}
 		}
 
 	}
 
-?>
\ No newline at end of file
+?>