diff --git a/src/decomp/engine/surface_collision.h b/src/decomp/engine/surface_collision.h
index 5f1995a..ee1b958 100644
--- a/src/decomp/engine/surface_collision.h
+++ b/src/decomp/engine/surface_collision.h
@@ -9,8 +9,8 @@
 #define LEVEL_BOUNDARY_MAX  0x2000
 #define CELL_SIZE           0x400       
 
-#define CELL_HEIGHT_LIMIT   20000.f
-#define FLOOR_LOWER_LIMIT  -11000.f
+#define CELL_HEIGHT_LIMIT   100000.f
+#define FLOOR_LOWER_LIMIT  -110000.f
 
 s32 f32_find_wall_collision(f32 *xPtr, f32 *yPtr, f32 *zPtr, f32 offsetY, f32 radius);
 s32 find_wall_collisions(struct SM64WallCollisionData *colData);