diff --git a/wadsrc/static/shaders_gles/glsl/func_paletted.fp b/wadsrc/static/shaders_gles/glsl/func_paletted.fp
index 8de8f0747..3b223d2f8 100644
--- a/wadsrc/static/shaders_gles/glsl/func_paletted.fp
+++ b/wadsrc/static/shaders_gles/glsl/func_paletted.fp
@@ -1,7 +1,7 @@
 
 vec4 ProcessTexel()
 {
-	float index = getTexel(vTexCoord.st).r;
+	float index = getTexel(vTexCoord.st).a;
  	index = ((index * 255.0) + 0.5) / 256.0;
 	vec4 tex = texture2D(texture2, vec2(index, 0.5));
 	tex.a = 1.0;