diff --git a/lib/redmine/scm/adapters/filesystem_adapter.rb b/lib/redmine/scm/adapters/filesystem_adapter.rb
index ac28436e8..24f3f1b76 100644
--- a/lib/redmine/scm/adapters/filesystem_adapter.rb
+++ b/lib/redmine/scm/adapters/filesystem_adapter.rb
@@ -111,7 +111,7 @@ module Redmine
         # Here we do not shell-out, so we do not want quotes.
         def target(path=nil)
           # Prevent the use of ..
-          if path and !/(^|\/)\.\.(\/|$)/.match?(path)
+          if path and !/(^|[\/\\])\.\.([\/\\]|$)/.match?(path)
             return "#{self.url}#{without_leading_slash(path)}"
           end