diff --git a/IPython/core/pylabtools.py b/IPython/core/pylabtools.py
index e3ec29e..6736564 100644
--- a/IPython/core/pylabtools.py
+++ b/IPython/core/pylabtools.py
@@ -15,9 +15,9 @@ backends = {'tk': 'TkAgg',
             'gtk': 'GTKAgg',
             'gtk3': 'GTK3Agg',
             'wx': 'WXAgg',
-            'qt': 'Qt4Agg', # qt3 not supported
             'qt4': 'Qt4Agg',
             'qt5': 'Qt5Agg',
+            'qt': 'Qt5Agg',
             'osx': 'MacOSX',
             'nbagg': 'nbAgg',
             'notebook': 'nbAgg',