diff --git a/hui-glium/shaders/fragment.frag b/hui-glium/shaders/fragment.frag
index eda6845..fd190b6 100644
--- a/hui-glium/shaders/fragment.frag
+++ b/hui-glium/shaders/fragment.frag
@@ -10,6 +10,7 @@ uniform sampler2D tex;
 
 void main() {
   //HACK: if vtx_uv is (0, 0) then the texture is not used
+  //disabling this will cause blinking
   if (vtx_uv.x == 0.0 && vtx_uv.y == 0.0) {
     out_color = vtx_color;
     return;