1 files changed, 23 insertions, 15 deletions
diff --git a/tmk_core/common/action_layer.h b/tmk_core/common/action_layer.h
index 6e2f35d90d..7fa30c86d6 100644
--- a/tmk_core/common/action_layer.h
+++ b/tmk_core/common/action_layer.h
@@ -21,24 +21,32 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "keyboard.h"
 #include "action.h"
 
+#if defined(LAYER_STATE_8BIT) || ( defined(DYNAMIC_KEYMAP_ENABLE) && DYNAMIC_KEYMAP_LAYER_COUNT >= 8 )
+typedef uint8_t layer_state_t;
+#elif defined(LAYER_STATE_16BIT)
+typedef uint16_t layer_state_t;
+#else
+typedef uint32_t layer_state_t;
+#endif
+
 
 /*
  * Default Layer
  */
-extern uint32_t default_layer_state;
+extern layer_state_t default_layer_state;
 void default_layer_debug(void);
-void default_layer_set(uint32_t state);
+void default_layer_set(layer_state_t state);
 
 __attribute__((weak))
-uint32_t default_layer_state_set_kb(uint32_t state);
+layer_state_t default_layer_state_set_kb(layer_state_t state);
 __attribute__((weak))
-uint32_t default_layer_state_set_user(uint32_t state);
+layer_state_t default_layer_state_set_user(layer_state_t state);
 
 #ifndef NO_ACTION_LAYER
 /* bitwise operation */
-void default_layer_or(uint32_t state);
-void default_layer_and(uint32_t state);
-void default_layer_xor(uint32_t state);
+void default_layer_or(layer_state_t state);
+void default_layer_and(layer_state_t state);
+void default_layer_xor(layer_state_t state);
 #else
 #define default_layer_or(state)
 #define default_layer_and(state)
@@ -50,11 +58,11 @@ void default_layer_xor(uint32_t state);
  * Keymap Layer
  */
 #ifndef NO_ACTION_LAYER
-extern uint32_t layer_state;
+extern layer_state_t layer_state;
 
-void layer_state_set(uint32_t state);
+void layer_state_set(layer_state_t state);
 bool layer_state_is(uint8_t layer);
-bool layer_state_cmp(uint32_t layer1, uint8_t layer2);
+bool layer_state_cmp(layer_state_t layer1, uint8_t layer2);
 
 void layer_debug(void);
 void layer_clear(void);
@@ -63,9 +71,9 @@ void layer_on(uint8_t layer);
 void layer_off(uint8_t layer);
 void layer_invert(uint8_t layer);
 /* bitwise operation */
-void layer_or(uint32_t state);
-void layer_and(uint32_t state);
-void layer_xor(uint32_t state);
+void layer_or(layer_state_t state);
+void layer_and(layer_state_t state);
+void layer_xor(layer_state_t state);
 #else
 #define layer_state                    0
 
@@ -84,8 +92,8 @@ void layer_xor(uint32_t state);
 #define layer_xor(state)
 #endif
 
-uint32_t layer_state_set_user(uint32_t state);
-uint32_t layer_state_set_kb(uint32_t state);
+layer_state_t layer_state_set_user(layer_state_t state);
+layer_state_t layer_state_set_kb(layer_state_t state);
 
 /* pressed actions cache */
 #if !defined(NO_ACTION_LAYER) && !defined(STRICT_LAYER_RELEASE)