diff --git a/tools/jetpack.lua b/tools/jetpack.lua
index 9a61a7e..2f1f0a0 100644
--- a/tools/jetpack.lua
+++ b/tools/jetpack.lua
@@ -31,7 +31,7 @@ function industrialtest.JetpackBase.update(self, player, inv, itemstack, dtime)
 		if movementGravity and movementGravity > 10 then
 			reverseGravityForce = 2
 		end
-		self.addYVelocityClamped(player,1,10)
+		self.addYVelocityClamped(player,reverseGravityForce,10)
 		if not soundHandles[playerName] then
 			local pos = player:get_pos()
 			local handle = minetest.sound_play("industrialtest_jetpack_loop", {