diff --git a/input/keycodes.c b/input/keycodes.c
index 73ee6ed222..418389bd4d 100644
--- a/input/keycodes.c
+++ b/input/keycodes.c
@@ -99,6 +99,10 @@ static const struct key_name key_names[] = {
     { MP_KEY_KPDOWN, "KP_DOWN" },
     { MP_KEY_KPUP, "KP_UP" },
     { MP_KEY_KPENTER, "KP_ENTER" },
+    { MP_KEY_KPADD, "KP_ADD" },
+    { MP_KEY_KPSUBTRACT, "KP_SUBTRACT" },
+    { MP_KEY_KPMULTIPLY, "KP_MULTIPLY" },
+    { MP_KEY_KPDIVIDE, "KP_DIVIDE" },
     { MP_MBTN_LEFT, "MBTN_LEFT" },
     { MP_MBTN_MID, "MBTN_MID" },
     { MP_MBTN_RIGHT, "MBTN_RIGHT" },
diff --git a/input/keycodes.h b/input/keycodes.h
index a4b35cd871..6e796015b5 100644
--- a/input/keycodes.h
+++ b/input/keycodes.h
@@ -116,6 +116,10 @@
 #define MP_KEY_KPDOWN  (MP_KEY_KEYPAD+20)
 #define MP_KEY_KPUP  (MP_KEY_KEYPAD+21)
 #define MP_KEY_KPBEGIN  (MP_KEY_KEYPAD+22)
+#define MP_KEY_KPADD  (MP_KEY_KEYPAD+23)
+#define MP_KEY_KPSUBTRACT  (MP_KEY_KEYPAD+24)
+#define MP_KEY_KPMULTIPLY  (MP_KEY_KEYPAD+25)
+#define MP_KEY_KPDIVIDE  (MP_KEY_KEYPAD+26)
 
 // Mouse events from VOs
 #define MP_MBTN_BASE     ((MP_KEY_BASE+0xA0)|MP_NO_REPEAT_KEY|MP_KEY_EMIT_ON_UP)