diff --git a/spine-unity/Assets/spine-unity/SkeletonUtility/SkeletonUtilityGroundConstraint.cs b/spine-unity/Assets/spine-unity/SkeletonUtility/SkeletonUtilityGroundConstraint.cs
index 371b5f170..2b8837eac 100644
--- a/spine-unity/Assets/spine-unity/SkeletonUtility/SkeletonUtilityGroundConstraint.cs
+++ b/spine-unity/Assets/spine-unity/SkeletonUtility/SkeletonUtilityGroundConstraint.cs
@@ -71,6 +71,7 @@ public class SkeletonUtilityGroundConstraint : SkeletonUtilityConstraint {
 
 	protected override void OnEnable () {
 		base.OnEnable();
+		lastHitY = transform.position.y;
 	}
 
 	protected override void OnDisable () {