diff --git a/wadsrc/static/shaders/scene/layout_frag.glsl b/wadsrc/static/shaders/scene/layout_frag.glsl
index 925436afd..0cf2b01e0 100644
--- a/wadsrc/static/shaders/scene/layout_frag.glsl
+++ b/wadsrc/static/shaders/scene/layout_frag.glsl
@@ -41,6 +41,11 @@ vec4 textureGrad(int index, vec2 P, vec2 dPdx, vec2 dPdy)
 	return textureGrad(textures[uTextureIndex + index], P, dPdx, dPdy);
 }
 
+vec4 textureLod(int index, vec2 P, float lod)
+{
+	return textureLod(textures[uTextureIndex + index], P, lod);
+}
+
 vec4 texelFetch(int index, ivec2 P, int lod)
 {
 	return texelFetch(textures[uTextureIndex + index], P, lod);