diff --git a/lib/kgrader/backend/svn.rb b/lib/kgrader/backend/svn.rb
index 3644c3b..9566e8b 100644
--- a/lib/kgrader/backend/svn.rb
+++ b/lib/kgrader/backend/svn.rb
@@ -52,9 +52,9 @@ module KGrader::Backend
     end
 
     def commit(repo, message, *paths)
-      fullpaths = *paths.map { |fn| File.join repo, fn }
-      run 'add', fullpaths
-      run 'commit', '-m', message, fullpaths
+      fullpaths = paths.map { |fn| File.join repo, fn }
+      run 'add', *fullpaths
+      run 'commit', '-m', message, *fullpaths
     end
 
     def commit_date(repo)