diff --git a/ChangeLog b/ChangeLog
index a7b59ed..95b23c6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2013-12-13  Niibe Yutaka  <gniibe@fsij.org>
 
+	* src/usb_ctrl.c (HID_LED_STATUS_CARDCHANGE): Rename from
+	HID_LED_STATUS_NUMLOCK.
+
 	* tool/gnuk_token.py (gnuk_token.stop_gnuk): Detach kernel
 	driver of HID.
 
diff --git a/src/usb_ctrl.c b/src/usb_ctrl.c
index 5778f7a..d5fc900 100644
--- a/src/usb_ctrl.c
+++ b/src/usb_ctrl.c
@@ -128,7 +128,10 @@ uint32_t bDeviceState = UNCONNECTED; /* USB device status */
 #define USB_HID_REQ_SET_IDLE     10
 #define USB_HID_REQ_SET_PROTOCOL 11
 
-#define HID_LED_STATUS_NUMLOCK 0x01
+#ifndef HID_LED_STATUS_CARDCHANGE
+/* NumLock=1, CapsLock=2, ScrollLock=4 */
+#define HID_LED_STATUS_CARDCHANGE 0x04
+#endif
 
 static uint8_t hid_idle_rate;	/* in 4ms */
 static uint8_t hid_report_saved;
@@ -416,7 +419,7 @@ usb_cb_ctrl_write_finish (uint8_t req, uint8_t req_no, uint16_t value,
     {
       if (index == 1 && req_no == USB_HID_REQ_SET_REPORT)
 	{
-	  if ((hid_report ^ hid_report_saved) & HID_LED_STATUS_NUMLOCK)
+	  if ((hid_report ^ hid_report_saved) & HID_LED_STATUS_CARDCHANGE)
 	    ccid_card_change_signal ();
 
 	  hid_report_saved = hid_report;