diff -r 4ae62ddf7bc7 Lib/rlcompleter.py
--- a/Lib/rlcompleter.py	Wed Nov 18 12:44:49 2015 -0500
+++ b/Lib/rlcompleter.py	Thu Nov 19 15:08:49 2015 -0500
@@ -75,7 +75,9 @@
 
         if not text.strip():
             if state == 0:
-                return '\t'
+                readline.insert_text('\t')
+                readline.redisplay()
+                return ''
             else:
                 return None