diff --git a/package/Shaders/Water.hlsl b/package/Shaders/Water.hlsl
index a2c7895bed..8e98ca3dc5 100644
--- a/package/Shaders/Water.hlsl
+++ b/package/Shaders/Water.hlsl
@@ -1287,7 +1287,7 @@ PS_OUTPUT main(PS_INPUT input)
 	float fogDistanceFactor = input.FogParam.w;
 	float3 fogColor = Color::Fog(input.FogParam.xyz);
 #						else
-	float fogDistanceFactor = min(FogFarColor.w, pow(saturate(input.WPosition.w * FogParam.y - FogParam.x), FresnelRI.y));
+	float fogDistanceFactor = min(FogFarColor.w, pow(saturate(length(input.WPosition.xyz) * FogParam.y - FogParam.x), FresnelRI.y));
 	float3 fogColor = Color::Fog(lerp(FogNearColor.xyz, FogFarColor.xyz, fogDistanceFactor));
 #						endif
 
@@ -1315,7 +1315,7 @@ float3 finalColor = lerp(finalColorPreFog, fogColor * PosAdjust[eyeIndex].w, Col
     float fogDistanceFactor = input.FogParam.w;
     float3 preFogColor = Color::Fog(input.FogParam.xyz);
 #						else
-    float fogDistanceFactor = min(FogFarColor.w, pow(saturate(input.WPosition.w * FogParam.y - FogParam.x), FresnelRI.y));
+    float fogDistanceFactor = min(FogFarColor.w, pow(saturate(length(input.WPosition.xyz) * FogParam.y - FogParam.x), FresnelRI.y));
     float3 preFogColor = Color::Fog(lerp(FogNearColor.xyz, FogFarColor.xyz, fogDistanceFactor));
 #						endif