diff --git a/src/calibre/customize/__init__.py b/src/calibre/customize/__init__.py
index 251f527bb6..b4e9b6c448 100644
--- a/src/calibre/customize/__init__.py
+++ b/src/calibre/customize/__init__.py
@@ -373,7 +373,7 @@ class InterfaceActionBase(Plugin): # {{{
 
     def load_actual_plugin(self, gui):
         '''
-        This method should must the actual interface action plugin object.
+        This method must return the actual interface action plugin object.
         '''
         mod, cls = self.actual_plugin.split(':')
         return getattr(__import__(mod, fromlist=['1'], level=0), cls)(gui,