diff --git a/README.md b/README.md
index 1d407be..3b94ee2 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ ATmega32u4 can be easily changed to act as keyboard and/or mouse too. With keybo
 - Sega Genesis / Megadrive controllers (3 and 6-button versions) ²: [RetroJoystickAdapter_Megadrive.ino](RetroJoystickAdapter_Megadrive.ino), [hardware](megadrive)
 - Sony Playstation with Analog and Multitap 4 controllers support: [RetroJoystickAdapter_Playstation.ino](RetroJoystickAdapter_Playstation.ino), [hardware](playstation)
 - Nintendo 64 controller ¹ (⚠️ 3.3V!): [RetroJoystickAdapter_N64.ino](RetroJoystickAdapter_N64.ino)
-- Wii Nunchuck and Classic Controller (and maybe Pro, not tested): [RetroJoystickAdapter_WiiExtension.ino (3.3V!)](RetroJoystickAdapter_WiiExtension.ino)
+- Wii Nunchuck and Classic Controller (and maybe Pro, not tested) (⚠️ 3.3V!): [RetroJoystickAdapter_WiiExtension.ino](RetroJoystickAdapter_WiiExtension.ino)
 - X-Arcade ²: [hardware](X-Arcade)
 - AT and PS/2 Keyboard to 4 joysticks: [hardware](Keyboard_PS2)
 - Soarer's programmable AT and PS/2 adapter (works with X-arcade too): [PS2_Soarer_Converter](PS2_Soarer_Converter)