diff --git a/src/Model01.cpp b/src/Model01.cpp
index f8fda144..7290b70f 100644
--- a/src/Model01.cpp
+++ b/src/Model01.cpp
@@ -107,12 +107,12 @@ void Model01::act_on_matrix_scan() {
 
             uint8_t keynum = (row*8)+(col);
 
-            handle_key_event(row, 7-col,
+            handle_key_event(Key_NoKey, row, 7-col,
                              bitRead(leftHandState.all, keynum),
                              bitRead(previousLeftHandState.all, keynum)
                             );
 
-            handle_key_event(row, (15- col),
+            handle_key_event(Key_NoKey, row, (15- col),
                              bitRead(rightHandState.all, keynum),
                              bitRead(previousRightHandState.all, keynum)
                             );
diff --git a/src/TestMode.cpp b/src/TestMode.cpp
index 5d10d4a6..4edc0239 100644
--- a/src/TestMode.cpp
+++ b/src/TestMode.cpp
@@ -61,7 +61,7 @@ void TestMode_::TestMatrix () {
 void TestMode_::setup() {
     eventHandlers[0] = handle_key_event_test;
 }
-bool handle_key_event_test(byte row, byte col, uint8_t currentState, uint8_t previousState) {
+bool handle_key_event_test(Key mappedKey, byte row, byte col, uint8_t currentState, uint8_t previousState) {
     Serial.write(row);
 }
 
diff --git a/src/TestMode.h b/src/TestMode.h
index 3d99d465..4dcf8cf8 100644
--- a/src/TestMode.h
+++ b/src/TestMode.h
@@ -15,4 +15,4 @@ class TestMode_ {
 
 extern TestMode_ TestMode;
 
-bool handle_key_event_test(byte row, byte col, uint8_t currentState, uint8_t previousState);
+bool handle_key_event_test(Key mappedKey, byte row, byte col, uint8_t currentState, uint8_t previousState);
diff --git a/src/hooks.h b/src/hooks.h
index 93b4057d..cec4da50 100644
--- a/src/hooks.h
+++ b/src/hooks.h
@@ -1,10 +1,11 @@
 #pragma once
 
 #include <Arduino.h>
+#include "key_defs.h"
 
 #define HOOK_MAX 64
 
-typedef bool (*custom_handler_t)(byte row, byte col, uint8_t currentState, uint8_t previousState);
+typedef bool (*custom_handler_t)(Key mappedKey, byte row, byte col, uint8_t currentState, uint8_t previousState);
 extern custom_handler_t eventHandlers[HOOK_MAX];
 
 void event_handler_hook_add (custom_handler_t hook);
diff --git a/src/key_events.cpp b/src/key_events.cpp
index d1753ba5..09c24aa6 100644
--- a/src/key_events.cpp
+++ b/src/key_events.cpp
@@ -49,19 +49,21 @@ Key lookup_key(byte keymap, byte row, byte col) {
     return mappedKey;
 }
 
-void handle_key_event(byte row, byte col, uint8_t currentState, uint8_t previousState) {
+void handle_key_event(Key mappedKey, byte row, byte col, uint8_t currentState, uint8_t previousState) {
     for (byte i = 0; eventHandlers[i] != NULL && i < HOOK_MAX; i++) {
         custom_handler_t handler = eventHandlers[i];
-        if ((*handler)(row, col, currentState, previousState))
+        if ((*handler)(mappedKey, row, col, currentState, previousState))
             return;
     }
 }
 
-bool handle_key_event_default(byte row, byte col, uint8_t currentState, uint8_t previousState) {
+bool handle_key_event_default(Key mappedKey, byte row, byte col, uint8_t currentState, uint8_t previousState) {
     //for every newly pressed button, figure out what logical key it is and send a key down event
     // for every newly released button, figure out what logical key it is and send a key up event
 
-    Key mappedKey = lookup_key(temporary_keymap, row, col);
+    if (mappedKey.raw == Key_NoKey.raw) {
+      mappedKey = lookup_key(temporary_keymap, row, col);
+    }
     Key baseKey   = lookup_key(primary_keymap, row, col);
 
     if ((baseKey.flags & SWITCH_TO_KEYMAP
diff --git a/src/key_events.h b/src/key_events.h
index 633f9f0a..3b71e073 100644
--- a/src/key_events.h
+++ b/src/key_events.h
@@ -16,10 +16,10 @@ extern const Key keymaps[][ROWS][COLS];
 
 // sending events to the computer
 void handle_synthetic_key_event( Key mappedKey, uint8_t currentState, uint8_t previousState);
-void handle_key_event(byte row, byte col, uint8_t currentState, uint8_t previousState);
+void handle_key_event(Key mappedKey, byte row, byte col, uint8_t currentState, uint8_t previousState);
 void press_key(Key mappedKey);
 void handle_keymap_key_event(Key keymapEntry, uint8_t currentState, uint8_t previousState);
 void handle_mouse_key_event(Key mappedKey, uint8_t currentState, uint8_t previousState);
-bool handle_key_event_default(byte row, byte col, uint8_t currentState, uint8_t previousState);
+bool handle_key_event_default(Key mappedKey, byte row, byte col, uint8_t currentState, uint8_t previousState);
 
 Key lookup_key(byte keymap, byte row, byte col);