diff --git a/lib/redmine/scm/adapters/abstract_adapter.rb b/lib/redmine/scm/adapters/abstract_adapter.rb
index 3e51f2d..b49d8ea 100644
--- a/lib/redmine/scm/adapters/abstract_adapter.rb
+++ b/lib/redmine/scm/adapters/abstract_adapter.rb
@@ -16,6 +16,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 require 'cgi'
+require 'redmine/scm/adapters'
 
 if RUBY_VERSION < '1.9'
   require 'iconv'
@@ -24,13 +25,11 @@ end
 module Redmine
   module Scm
     module Adapters

       class AbstractAdapter #:nodoc:
 
         # raised if scm command exited with error, e.g. unknown revision.
         class ScmCommandAborted < CommandFailed; end
 
         class << self
           def client_command
@@ -184,7 +183,7 @@ module Redmine
         def without_trailling_slash(path)
           path ||= ''
           (path[-1,1] == "/") ? path[0..-2] : path
-         end
+        end
 
         def shell_quote(str)
           self.class.shell_quote(str)