diff --git a/common/keyboard.c b/common/keyboard.c
index 6677e801..1aff81f5 100644
--- a/common/keyboard.c
+++ b/common/keyboard.c
@@ -26,6 +26,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "command.h"
 #include "util.h"
 #include "sendchar.h"
+#include "bootloader.h"
 #ifdef MOUSEKEY_ENABLE
 #include "mousekey.h"
 #endif
@@ -68,21 +69,21 @@ void keyboard_task(void)
     matrix_row_t matrix_change = 0;
 
     matrix_scan();
-    for (int r = 0; r < MATRIX_ROWS; r++) {
+    for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
         matrix_row = matrix_get_row(r);
         matrix_change = matrix_row ^ matrix_prev[r];
         if (matrix_change) {
             if (debug_matrix) matrix_print();
 
-            for (int c = 0; c < MATRIX_COLS; c++) {
-                if (matrix_change & (1<<c)) {
+            for (uint8_t c = 0; c < MATRIX_COLS; c++) {
+                if (matrix_change & ((matrix_row_t)1<<c)) {
                     action_exec((keyevent_t){
                         .key.pos  = (keypos_t){ .row = r, .col = c },
                         .pressed = (matrix_row & (1<<c)),
                         .time = (timer_read() | 1) /* NOTE: 0 means no event */
                     });
                     // record a processed key
-                    matrix_prev[r] ^= (1<<c);
+                    matrix_prev[r] ^= ((matrix_row_t)1<<c);
                     // process a key per task call
                     goto MATRIX_LOOP_END;
                 }
@@ -90,12 +91,7 @@ void keyboard_task(void)
         }
     }
     // call with not real event to update state of aciton
-    // TODO: use NOEVENT macro
-    action_exec((keyevent_t) {
-        .key.pos = (keypos_t){ .row = 255, .col = 255 }, // assume this key doesn't exist
-        .pressed = false,
-        .time = 0,
-    });
+    action_exec(NOEVENT);
 
 MATRIX_LOOP_END:
 
diff --git a/common/keyboard.h b/common/keyboard.h
index 6d06c95b..84f03c9a 100644
--- a/common/keyboard.h
+++ b/common/keyboard.h
@@ -44,10 +44,10 @@ typedef struct {
 
 #define KEYEQ(keya, keyb)       (keya.raw == keyb.raw)
 #define IS_NOEVENT(event)       (event.time == 0)
-#define NOEVENT                 (keyevent_t){       \
-    .key = (keypos_t){ .row = 255, .col = 255 },    \
-    .pressed = false,                               \
-    .time = 0                                       \
+#define NOEVENT                 (keyevent_t){           \
+    .key.pos = (keypos_t){ .row = 255, .col = 255 },    \
+    .pressed = false,                                   \
+    .time = 0                                           \
 }