diff --git a/glsl/postprocess_menufade.frag b/glsl/postprocess_menufade.frag
index 28955da20a..01e29dde8f 100644
--- a/glsl/postprocess_menufade.frag
+++ b/glsl/postprocess_menufade.frag
@@ -27,6 +27,6 @@ vec4 ColorForEffect(float effect, vec4 c)
 
 void main()
 {
-	vec4 c = texture(WorldTexture, gl_FragCoord.xy / textureSize(WorldTexture, 0));
+	vec4 c = texture(WorldTexture, gl_FragCoord.xy / vec2(textureSize(WorldTexture, 0)));
 	fragColor = ColorForEffect(From, c) * Blend + ColorForEffect(To, c) * (1.0 - Blend);
 }