diff --git a/server/player/player.go b/server/player/player.go
index 728494a69..bbe1cf5de 100644
--- a/server/player/player.go
+++ b/server/player/player.go
@@ -2866,7 +2866,9 @@ func (p *Player) checkEntitySteppers() {
 
 // checkOnGround checks if the player is currently considered to be on the ground.
 func (p *Player) checkOnGround(deltaPos mgl64.Vec3) bool {
-	box := Type.BBox(p).Translate(p.Position()).Extend(mgl64.Vec3{0, -0.05}).Extend(deltaPos.Mul(-1.0))
+	// Probe straight down (0.05 plus this tick's descent) instead of along the
+	// whole movement, so a block the player falls past at its side is not ground.
+	box := Type.BBox(p).Translate(p.Position()).Extend(mgl64.Vec3{0, -0.05}).Extend(mgl64.Vec3{0, math.Min(deltaPos[1], 0)})
 	b := box.Grow(1)
 
 	epsilon := mgl64.Vec3{mgl64.Epsilon, mgl64.Epsilon, mgl64.Epsilon}