diff --git a/src/IME/MetasequoiaIME.h b/src/IME/MetasequoiaIME.h
index 2c0725f3..a1875846 100644
--- a/src/IME/MetasequoiaIME.h
+++ b/src/IME/MetasequoiaIME.h
@@ -68,6 +68,7 @@ class CMetasequoiaIME : public ITfTextInputProcessorEx,
                         public ITfFnGetPreferredTouchKeyboardLayout
 {
     friend class CCompositionProcessorEngine;
+    friend class CKeyHandlerEditSession;
 
   public:
     CMetasequoiaIME();