diff --git a/include/collide.h b/include/collide.h
index c7c9b49..2534393 100644
--- a/include/collide.h
+++ b/include/collide.h
@@ -10,10 +10,10 @@
 /* return tile at the given position
  * -1 is out of bound */
 uint8_t collide_point(Vec point, const Level *level, uint layer);
-_Bool collide_right(Player *player, Vec position, const Level *level, uint layer_id);
-_Bool collide_left(Player *player, Vec position, const Level *level, uint layer_id);
-_Bool collide_down(Player *player, Vec position, const Level *level, uint layer_id);
-_Bool collide_up(Player *player, Vec position, const Level *level, uint layer_id);
-_Bool collide_full(Player *player, Vec position, const Level *level, uint layer_id);
+bool collide_right(Player *player, Vec position, const Level *level, uint layer_id);
+bool collide_left(Player *player, Vec position, const Level *level, uint layer_id);
+bool collide_down(Player *player, Vec position, const Level *level, uint layer_id);
+bool collide_up(Player *player, Vec position, const Level *level, uint layer_id);
+bool collide_full(Player *player, Vec position, const Level *level, uint layer_id);
 
 #endif /* _DEF_PLAYER_COLLIDE */
diff --git a/include/input.h b/include/input.h
index b63164b..818b379 100644
--- a/include/input.h
+++ b/include/input.h
@@ -2,6 +2,7 @@
 #define _DEF_INPUT
 
 #include <gint/defs/types.h>
+#include <stdbool.h>
 
 #define KEYS_COUNT 5
 
@@ -35,9 +36,9 @@ void input_init(Input *input);
 /* display all keys states and information */
 void input_draw_debug(Input *input);
 
-_Bool input_is_pressed(Input *input, uint8_t key);
-_Bool input_is_down(Input *input, uint8_t key);
-_Bool input_is_released(Input *input, uint8_t key);
-_Bool input_is_up(Input *input, uint8_t key);
+bool input_is_pressed(Input *input, uint8_t key);
+bool input_is_down(Input *input, uint8_t key);
+bool input_is_released(Input *input, uint8_t key);
+bool input_is_up(Input *input, uint8_t key);
 
 #endif /* _DEF_INPUT */
diff --git a/src/collide.c b/src/collide.c
index 245f5a9..fe66488 100644
--- a/src/collide.c
+++ b/src/collide.c
@@ -21,7 +21,7 @@ uint8_t collide_point(Vec point, const Level *level, uint layer_id)
 	}
 }
 
-_Bool collide_right(Player *player, Vec position, const Level *level, uint layer_id)
+bool collide_right(Player *player, Vec position, const Level *level, uint layer_id)
 {
 	Vec pos;
 	vec_cpy(&pos, position);
@@ -39,7 +39,7 @@ _Bool collide_right(Player *player, Vec position, const Level *level, uint layer
 	return false;
 }
 
-_Bool collide_left(Player *player, Vec position, const Level *level, uint layer_id)
+bool collide_left(Player *player, Vec position, const Level *level, uint layer_id)
 {
 	Vec pos;
 	vec_cpy(&pos, position);
@@ -56,7 +56,7 @@ _Bool collide_left(Player *player, Vec position, const Level *level, uint layer_
 	return false;
 }
 
-_Bool collide_down(Player *player, Vec position, const Level *level, uint layer_id)
+bool collide_down(Player *player, Vec position, const Level *level, uint layer_id)
 {
 	Vec pos;
 	vec_cpy(&pos, position);
@@ -74,7 +74,7 @@ _Bool collide_down(Player *player, Vec position, const Level *level, uint layer_
 	return false;
 }
 
-_Bool collide_up(Player *player, Vec position, const Level *level, uint layer_id)
+bool collide_up(Player *player, Vec position, const Level *level, uint layer_id)
 {
 	Vec pos;
 	vec_cpy(&pos, position);
@@ -91,7 +91,7 @@ _Bool collide_up(Player *player, Vec position, const Level *level, uint layer_id
 	return false;
 }
 
-_Bool collide_full(Player *player, Vec position, const Level *level, uint layer_id)
+bool collide_full(Player *player, Vec position, const Level *level, uint layer_id)
 {
 	return collide_up(player, position, level, layer_id) ||
 		collide_down(player, position, level, layer_id);
diff --git a/src/input.c b/src/input.c
index 283be83..d582b9c 100644
--- a/src/input.c
+++ b/src/input.c
@@ -13,7 +13,7 @@ void input_step(Input *input)
 		uint8_t *state = &input->states[i];
 		uint8_t key = input->keys[i];
 		/* get if the key is pressed */
-		_Bool pressed = keydown(key);
+		bool pressed = keydown(key);
 		/* update input status */
 		if (pressed)
 		{
@@ -53,22 +53,22 @@ void input_draw_debug(Input *input)
 	}
 }
 
-_Bool input_is_pressed(Input *input, uint8_t key)
+bool input_is_pressed(Input *input, uint8_t key)
 {
 	return input->states[key] == S_PRESSED;
 }
 
-_Bool input_is_down(Input *input, uint8_t key)
+bool input_is_down(Input *input, uint8_t key)
 {
 	return (input->states[key] == S_DOWN) || (input->states[key] == S_PRESSED);
 }
 
-_Bool input_is_released(Input *input, uint8_t key)
+bool input_is_released(Input *input, uint8_t key)
 {
 	return input->states[key] == S_RELEASED;
 }
 
-_Bool input_is_up(Input *input, uint8_t key)
+bool input_is_up(Input *input, uint8_t key)
 {
 	return (input->states[key] == S_UP) || (input->states[key] == S_RELEASED);
 }