diff --git a/src/plone/app/mosaic/browser/interfaces.py b/src/plone/app/mosaic/browser/interfaces.py
index <HASH>..<HASH> 100644
--- a/src/plone/app/mosaic/browser/interfaces.py
+++ b/src/plone/app/mosaic/browser/interfaces.py
@@ -1,7 +1,11 @@
 # -*- coding: utf-8 -*-
 from zope.interface import Interface
 
+try:
+    from Products.CMFPlone.browser.interfaces import IMainTemplate
 
+except ImportError:
+
+    class IMainTemplate(Interface):
+        """Interface to the view that generated the main_template"""
 
-class IMainTemplate(Interface):
-    """Interface to the view that generated the main_template"""
Fix to use CMFPlone's IMainTemplate on Plone 5