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-rw-r--r--tmk_core/common/keycode.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/tmk_core/common/keycode.h b/tmk_core/common/keycode.h
index 734c9fbff..9cb4f1e0c 100644
--- a/tmk_core/common/keycode.h
+++ b/tmk_core/common/keycode.h
@@ -17,7 +17,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
/*
* Keycodes based on HID Usage Keyboard/Keypad Page(0x07) plus special codes
- * http://www.usb.org/developers/devclass_docs/Hut1_12.pdf
+ * https://web.archive.org/web/20060218214400/http://www.usb.org/developers/devclass_docs/Hut1_12.pdf
+ * or http://www.usb.org/developers/hidpage/Hut1_12v2.pdf (older)
*/
#ifndef KEYCODE_H
#define KEYCODE_H