diff --git a/server/lib/classes/system.inc.php b/server/lib/classes/system.inc.php
index a393384c96b7c77bca45360f7643fc85ea414c4e..52c9f803df9d156cc83daf9de1c2c4570ffc5c10 100644
--- a/server/lib/classes/system.inc.php
+++ b/server/lib/classes/system.inc.php
@@ -851,7 +851,7 @@ class system{
 
 		//* We allow only some characters in the path
 		// * is allowed, for example it is part of wildcard certificates/keys: *.example.com.crt
-		if(!preg_match('@^/[-a-zA-Z0-9_/.*~]{1,}$@', $path)) return false;
+		if(!preg_match('@^/[-a-zA-Z0-9_/.*]{1,}[~]?$@', $path)) return false;
 
 		//* Check path for symlinks
 		$path_parts = explode('/', $path);