diff --git a/lib/redmine/scm/adapters/subversion_adapter.rb b/lib/redmine/scm/adapters/subversion_adapter.rb
index a0a07f879..ad982dbc2 100644
--- a/lib/redmine/scm/adapters/subversion_adapter.rb
+++ b/lib/redmine/scm/adapters/subversion_adapter.rb
@@ -199,7 +199,7 @@ module Redmine
           revisions
         end
 
-        def diff(path, identifier_from, identifier_to=nil, type="inline")
+        def diff(path, identifier_from, identifier_to=nil)
           path ||= ''
           identifier_from = (identifier_from and identifier_from.to_i > 0) ? identifier_from.to_i : ''