diff --git a/Changelog.draft.rst b/Changelog.draft.rst
index 76a0ea3..7842f51 100644
--- a/Changelog.draft.rst
+++ b/Changelog.draft.rst
@@ -18,3 +18,7 @@ Changes
 
 Bug Fixes
 ---------
+
+* Fix the missing folder error that occured when a new remote folder was
+  detected (IMAP<->Maildir)
+
diff --git a/offlineimap/repository/Maildir.py b/offlineimap/repository/Maildir.py
index 70a5ca3..cdf054d 100644
--- a/offlineimap/repository/Maildir.py
+++ b/offlineimap/repository/Maildir.py
@@ -190,4 +190,8 @@ class MaildirRepository(BaseRepository):
         if self.folders == None:
             self.folders = self._getfolders_scandir(self.root)
         return self.folders
-    
+
+    def forgetfolders(self):
+        """Forgets the cached list of folders, if any.  Useful to run
+        after a sync run."""
+        self.folders = None