--- a/Preferences/__init__.py	Fri Dec 25 14:05:52 2015 +0100
+++ b/Preferences/__init__.py	Fri Dec 25 16:14:27 2015 +0100
@@ -817,6 +817,7 @@
         "PyQt4DocDir": "",
         "PyQt5DocDir": "",
         "PySideDocDir": "",
+        "EricDocDir": "",
         "SingleHelpWindow": True,
         "SaveGeometry": True,
         "HelpViewerState": QByteArray(),