diff --git a/src/board/system76/common/kbled.c b/src/board/system76/common/kbled.c
index 4328542..874f3fa 100644
--- a/src/board/system76/common/kbled.c
+++ b/src/board/system76/common/kbled.c
@@ -3,7 +3,7 @@
 #include <board/kbled.h>
 #include <common/macro.h>
 
-static int16_t LEVEL_I = 1;
+static uint8_t LEVEL_I = 1;
 static const uint8_t __code LEVELS[] = {
     48,
     72,
@@ -13,7 +13,7 @@ static const uint8_t __code LEVELS[] = {
     255
 };
 
-static int16_t COLOR_I = 0;
+static uint8_t COLOR_I = 0;
 static const uint32_t __code COLORS[] = {
     0xFFFFFF,
     0x0000FF,