diff --git a/data/shaders/fog.frag b/data/shaders/fog.frag
index 3560b0a69..104b57d83 100644
--- a/data/shaders/fog.frag
+++ b/data/shaders/fog.frag
@@ -10,7 +10,7 @@ vec4 getPosFromUVDepth(vec3 uvDepth, mat4 InverseProjectionMatrix);
 
 void main()
 {
-    vec2 uv = gl_FragCoord.xy / screen;
+    vec2 uv = 2. * gl_FragCoord.xy / screen;
     float z = texture(tex, uv).x;
     vec4 xpos = getPosFromUVDepth(vec3(uv, z), InverseProjectionMatrix);