diff --git a/assets/scripts/core/level.js b/assets/scripts/core/level.js
index 8e41777c..bd9e7830 100644
--- a/assets/scripts/core/level.js
+++ b/assets/scripts/core/level.js
@@ -51,7 +51,7 @@ class Collider {
     }
     const surfaceY = this.getSlopeSurfaceY(worldX);
     if (surfaceY === null) return false;
-    return this.isSolidBelowSurface(gravityFlipped) ? worldY < surfaceY : worldY > surfaceY;
+    return this.slopeFlipY ? worldY > surfaceY : worldY < surfaceY;
   }
   getSlopeBackWallSide(gravityFlipped = false) {
     let leftWall = this.slopeDir > 0;
diff --git a/assets/scripts/core/player.js b/assets/scripts/core/player.js
index a3b54228..73294871 100644
--- a/assets/scripts/core/player.js
+++ b/assets/scripts/core/player.js
@@ -4829,7 +4829,7 @@ if (this.p.isFlying || this.p.isUfo) {
         const leftSurfY = nearObject.getSlopeSurfaceY(leftWorld);
         const rightSurfY = nearObject.getSlopeSurfaceY(rightWorld);
         if (leftSurfY !== null && rightSurfY !== null) {
-          const solidBelow = nearObject.isSolidBelowSurface(this.p.gravityFlipped);
+          const solidBelow = nearObject.isSolidBelowSurface(false);
           const leftIsBottom = Math.abs(leftSurfY - bboxBottom) < Math.abs(rightSurfY - bboxBottom);
           const thirdWorldX = solidBelow ? (leftIsBottom ? rightWorld : leftWorld) : (leftIsBottom ? leftWorld : rightWorld);
           const thirdWorldY = solidBelow ? bboxBottom : bboxTop;