diff --git a/wezterm-gui/src/glyph-frag.glsl b/wezterm-gui/src/glyph-frag.glsl
index 57b8dca0a..440f6eea5 100644
--- a/wezterm-gui/src/glyph-frag.glsl
+++ b/wezterm-gui/src/glyph-frag.glsl
@@ -134,7 +134,6 @@ void main() {
     // Grayscale poly quad for non-aa text render layers
     colorMask = texture(atlas_nearest_sampler, o_tex);
     color = fg_color;
-    color.a = mix(o_fg_color.a, o_fg_color_alt.a, clamp(o_fg_color_mix, 0.0, 1.0));
     color.a *= colorMask.a;
   } else if (o_has_color == 0.0) {
     // the texture is the alpha channel/color mask