diff --git a/esphome/components/mitsubishi/mitsubishi.h b/esphome/components/mitsubishi/mitsubishi.h
index 7925b7ce44..657da900e2 100644
--- a/esphome/components/mitsubishi/mitsubishi.h
+++ b/esphome/components/mitsubishi/mitsubishi.h
@@ -11,7 +11,7 @@ const uint8_t MITSUBISHI_TEMP_MIN = 16;  // Celsius
 const uint8_t MITSUBISHI_TEMP_MAX = 31;  // Celsius
 
 // Fan mode
-enum SetFanMode {
+enum SetFanMode : uint8_t {
   MITSUBISHI_FAN_3L = 0,  // 3 levels + auto
   MITSUBISHI_FAN_4L,      // 4 levels + auto
   MITSUBISHI_FAN_Q4L,     // Quiet + 4 levels + auto
@@ -19,7 +19,7 @@ enum SetFanMode {
 };
 
 // Enum to represent horizontal directios
-enum HorizontalDirection {
+enum HorizontalDirection : uint8_t {
   HORIZONTAL_DIRECTION_LEFT = 0x10,
   HORIZONTAL_DIRECTION_MIDDLE_LEFT = 0x20,
   HORIZONTAL_DIRECTION_MIDDLE = 0x30,
@@ -29,7 +29,7 @@ enum HorizontalDirection {
 };
 
 // Enum to represent vertical directions
-enum VerticalDirection {
+enum VerticalDirection : uint8_t {
   VERTICAL_DIRECTION_AUTO = 0x00,
   VERTICAL_DIRECTION_UP = 0x08,
   VERTICAL_DIRECTION_MIDDLE_UP = 0x10,