diff --git a/IPython/frontend/terminal/embed.py b/IPython/frontend/terminal/embed.py
index 655e354..81674bd 100755
--- a/IPython/frontend/terminal/embed.py
+++ b/IPython/frontend/terminal/embed.py
@@ -127,7 +127,7 @@ class InteractiveShellEmbed(TerminalInteractiveShell):
             return
 
         if self.has_readline:
-            self.set_completer()
+            self.set_readline_completer()
 
         # self.banner is auto computed
         if header: