diff --git a/src/net/torvald/terrarum/gameactors/ActorWithBody.kt b/src/net/torvald/terrarum/gameactors/ActorWithBody.kt
index d097a6be5..b0d6bb1cd 100644
--- a/src/net/torvald/terrarum/gameactors/ActorWithBody.kt
+++ b/src/net/torvald/terrarum/gameactors/ActorWithBody.kt
@@ -870,7 +870,6 @@ open class ActorWithBody(renderOrder: RenderOrder, val physProp: PhysProperties)
                             (offendingTileWorldY - offendingHitboxPointY).abs()
                     )
 
-
                     // FIXME jump-thru-ceil bug on 1px-wide (the edge), case-9 collision (does not occur on case-12 coll.)
 
 
@@ -896,6 +895,15 @@ open class ActorWithBody(renderOrder: RenderOrder, val physProp: PhysProperties)
                                         displacementAbs.y * displacementUnitVector.y
                                 )
 
+                    // adjust finalDisplacement for honest-to-god staircasing
+                    if (staircaseStatus in listOf(1, 4) && selfCollisionStatus in (if (gravitation.y >= 0.0) listOf(3,6) else listOf(9, 12))) {
+                        // TODO!!
+                        // remove Y displacement
+                        // let original X velocity to pass-thru instead of snapping to tiles coded above
+                        // pass-thru values are held by the vectorSum
+                    }
+
+
                     newHitbox.translate(finalDisplacement)