diff --git a/srcs/draw/raycast.c b/srcs/draw/raycast.c
index 50ffa74..793a385 100644
--- a/srcs/draw/raycast.c
+++ b/srcs/draw/raycast.c
@@ -30,7 +30,7 @@
 	}
 // tmp end
 
-static void	wall_height(t_rcast *rcast)
+static void	calcul_wall(t_rcast *rcast)
 {
 	int	height;
 	int	delta;
@@ -42,7 +42,10 @@ static void	wall_height(t_rcast *rcast)
 	else if (rcast->is_x == 0)
 		delta = rcast->next_y - rcast->ray_step_y;
 	height = rcast->screen_height * rcast->cell;
-	height *= rcast->slope_y * rcast->slope_x;
+	if (rcast->slope_x)
+		height *= rcast->slope_x;
+	if (rcast->slope_y)
+		height *= rcast->slope_y;
 	if (delta && rcast->screen_dist)
 		height /= (delta * rcast->screen_dist);
 
@@ -94,7 +97,7 @@ void	raycast(t_game *game, t_rcast *rcast)
 			draw_line(&game->map_img, &ray, 0x00FF00FF);
 		// tmp end
 
-		wall_height(rcast);
+		calcul_wall(rcast);
 		draw_column(game, rcast);
 		(rcast->ray_nb)++;
 	}