diff --git a/apps/plugins/xracer/graphics.c b/apps/plugins/xracer/graphics.c
index 1753bf5..f5f2718 100644
--- a/apps/plugins/xracer/graphics.c
+++ b/apps/plugins/xracer/graphics.c
@@ -214,9 +214,9 @@ void render(struct camera_t *camera, struct road_segment *road, unsigned int roa

     struct road_segment *base = FIND_SEGMENT(camera->pos.z, road, road_length);

-    double base_percent = (double)(camera->pos.z % SEGMENT_LENGTH) / (double)SEGMENT_LENGTH;
-    double dx = - ((double)base->curve * base_percent);
-    double x  = 0;
+    long base_percent = fp_div((camera->pos.z % SEGMENT_LENGTH) << FRACBITS, SEGMENT_LENGTH << FRACBITS, FRACBITS);
+    long dx = - fp_mul(base->curve << FRACBITS, base_percent, FRACBITS);
+    long x  = 0;

     /* clipping height, nothing is drawn below this */
     int maxy = LCD_HEIGHT;
@@ -232,7 +232,7 @@ void render(struct camera_t *camera, struct road_segment *road, unsigned int roa
     {
         struct road_segment *seg = &road[(base->idx + i) % road_length];

-        if(project_segment(base, seg, (int)x, (int)dx, camera, &p1, &p2, &maxy, road_length))
+        if(project_segment(base, seg, x >> FRACBITS, dx >> FRACBITS, camera, &p1, &p2, &maxy, road_length))
             render_segment(&p1, &p2, seg->color, seg->border_color, seg->lanes, seg->lane_color, seg->grass_color);
         /* curve calculation */
         x  += dx;