diff --git a/converter/adb_usb/config.h b/converter/adb_usb/config.h
index 4ce27bbfe..5ce5c2215 100644
--- a/converter/adb_usb/config.h
+++ b/converter/adb_usb/config.h
@@ -44,12 +44,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define USE_LEGACY_KEYMAP
 
 
-/* mouse keys */
-#ifdef MOUSEKEY_ENABLE
-#   define MOUSEKEY_DELAY_TIME 192
-#endif
-
-
 /* ADB port setting */
 #define ADB_PORT        PORTD
 #define ADB_PIN         PIND
diff --git a/converter/news_usb/config_pjrc.h b/converter/news_usb/config_pjrc.h
index 92751d1ee..adce014c9 100644
--- a/converter/news_usb/config_pjrc.h
+++ b/converter/news_usb/config_pjrc.h
@@ -42,12 +42,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 )
 
 
-/* mouse keys */
-#ifdef MOUSEKEY_ENABLE
-#   define MOUSEKEY_DELAY_TIME 255
-#endif
-
-
 /* Asynchronous USART
  * 8-data bit, non parity, 1-stop bit, no flow control
  */
diff --git a/converter/ps2_usb/config.h b/converter/ps2_usb/config.h
index 4a2d1fc47..6fbf13665 100644
--- a/converter/ps2_usb/config.h
+++ b/converter/ps2_usb/config.h
@@ -39,12 +39,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 )
 
 
-/* mouse keys */
-#ifdef MOUSEKEY_ENABLE
-#   define MOUSEKEY_DELAY_TIME 255
-#endif
-
-
 #ifdef PS2_USE_USART
 #if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
 /* XCK for clock line and RXD for data line */
diff --git a/keyboard/IIgs/config.h b/keyboard/IIgs/config.h
index 0039cb48b..842e404f9 100644
--- a/keyboard/IIgs/config.h
+++ b/keyboard/IIgs/config.h
@@ -56,10 +56,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define LAYER_SEND_FN_TERM 300
 
 
-/* mouse keys */
-#ifdef MOUSEKEY_ENABLE
-#   define MOUSEKEY_DELAY_TIME 192
-#endif
-
-
 #endif
diff --git a/keyboard/hhkb/config_iwrap.h b/keyboard/hhkb/config_iwrap.h
index 80a608882..747c75513 100644
--- a/keyboard/hhkb/config_iwrap.h
+++ b/keyboard/hhkb/config_iwrap.h
@@ -34,11 +34,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* key combination for command */
 #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT))) 
 
-/* mouse keys */
-#ifdef MOUSEKEY_ENABLE
-#   define MOUSEKEY_DELAY_TIME 255
-#endif
-
 /* pins for Software UART */
 #define SUART_IN_PIN    PINC
 #define SUART_IN_BIT    5
diff --git a/keyboard/hhkb/config_vusb.h b/keyboard/hhkb/config_vusb.h
index 37d3e4f22..44f7acd6c 100644
--- a/keyboard/hhkb/config_vusb.h
+++ b/keyboard/hhkb/config_vusb.h
@@ -35,10 +35,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* key combination for command */
 #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT))) 
 
-/* mouse keys */
-#ifdef MOUSEKEY_ENABLE
-#   define MOUSEKEY_DELAY_TIME 100
-#endif
-
-
 #endif