diff -r 5dec1604322c Lib/idlelib/GrepDialog.py
--- a/Lib/idlelib/GrepDialog.py	Wed Feb 26 18:26:49 2014 -0500
+++ b/Lib/idlelib/GrepDialog.py	Wed Feb 26 20:52:30 2014 -0800
@@ -65,8 +65,9 @@
             return
         from idlelib.OutputWindow import OutputWindow
         save = sys.stdout
+        fiftitle = "Python: Matches for '%r'" % (self.engine.getpat())
         try:
-            sys.stdout = OutputWindow(self.flist)
+            sys.stdout = OutputWindow(self.flist, title=fiftitle)
             self.grep_it(prog, path)
         finally:
             sys.stdout = save
diff -r 5dec1604322c Lib/idlelib/OutputWindow.py
--- a/Lib/idlelib/OutputWindow.py	Wed Feb 26 18:26:49 2014 -0500
+++ b/Lib/idlelib/OutputWindow.py	Wed Feb 26 20:52:30 2014 -0800
@@ -12,7 +12,8 @@
     This class has no input facilities.
     """
 
-    def __init__(self, *args):
+    def __init__(self, *args, **kwargs):
+        self.title=kwargs.get('title', 'Output')
         EditorWindow.__init__(self, *args)
         self.text.bind("<<goto-file-line>>", self.goto_file_line)
 
@@ -23,7 +24,7 @@
         return 0
 
     def short_title(self):
-        return "Output"
+        return self.title
 
     def maybesave(self):
         # Override base class method -- don't ask any questions