diff --git a/lib/git/base.rb b/lib/git/base.rb
index e5e5b3e5..9833427a 100644
--- a/lib/git/base.rb
+++ b/lib/git/base.rb
@@ -165,6 +165,11 @@ def gblob(objectish)
       Git::Object.new(self, objectish, 'blob')
     end
     
+    # returns files affected by a commit
+    def show_filenames(sha)
+      self.lib.show_filenames(sha)
+    end
+
     # returns a Git::Log object with count commits
     def log(count = 30)
       Git::Log.new(self, count)
diff --git a/lib/git/lib.rb b/lib/git/lib.rb
index ed4ef1a8..b293737f 100644
--- a/lib/git/lib.rb
+++ b/lib/git/lib.rb
@@ -216,6 +216,10 @@ def branch_current
       branches_all.select { |b| b[1] }.first[0] rescue nil
     end
 
+    def show_filenames(sha)
+      arr = []
+      command_lines('show', ['--pretty="format:"', '--name-only', sha])
+    end
 
     # returns hash
     # [tree-ish] = [[line_no, match], [line_no, match2]]