diff --git a/FAQ-Keymap.md b/FAQ-Keymap.md
index 3f669430..bc846057 100644
--- a/FAQ-Keymap.md
+++ b/FAQ-Keymap.md
@@ -102,4 +102,13 @@ Japanese JIS keyboard specific keys like `無変換(Muhenkan)`, `変換(Henkan)`
 * Enable XFER Key on PC keyboard
 * Enable KATAKANA Key on PC keyboard
 
-https://pqrs.org/osx/karabiner/seil.html
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+https://pqrs.org/osx/karabiner/seil.html
+
+
+## RN-42 Bluetooth doesn't work with Karabiner
+Karabiner - Keymapping tool on Mac OSX - ignores inputs from RN-42 module by default. You have to enable this option to make Karabiner working with your keyboard.
+https://github.com/tekezo/Karabiner/issues/403#issuecomment-102559237
+
+See these for the deail of this problem.
+https://github.com/tmk/tmk_keyboard/issues/213
+https://github.com/tekezo/Karabiner/issues/403
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