diff --git a/src/gameplay_style.rs b/src/gameplay_style.rs
index c415e51..329e2db 100644
--- a/src/gameplay_style.rs
+++ b/src/gameplay_style.rs
@@ -1,6 +1,6 @@
 const VALVE_SCALE:Planar64=Planar64::raw(1<<28);// 1/16
 
-use crate::integer::{Time,Ratio64,Planar64,Planar64Vec3};
+use crate::integer::{Time,Ratio64,Planar64,Planar64Vec3,WideMul,WideDot};
 use crate::controls_bitflag::Controls;
 
 #[derive(Clone,Debug)]
@@ -72,7 +72,7 @@ impl JumpImpulse{
 				let g=gravity.wide_length();
 				let v_g=gravity.wide_dot(velocity);
 				//do it backwards
-				velocity-gravity.with_length(((v_g*v_g+g*height.widen()*2).sqrt()+v_g)/g)
+				velocity-gravity.with_length(((v_g.wide_mul(v_g)+g.wide_mul(height).wide_mul(2)).sqrt()+v_g).ratio(g))
 			},
 			&JumpImpulse::Linear(jump_speed)=>velocity+jump_dir.with_length(jump_speed),
 			&JumpImpulse::Energy(energy)=>{