diff --git a/crates/gpui/src/platform/windows/shaders.hlsl b/crates/gpui/src/platform/windows/shaders.hlsl
index 06a65e909f..1ed2de2240 100644
--- a/crates/gpui/src/platform/windows/shaders.hlsl
+++ b/crates/gpui/src/platform/windows/shaders.hlsl
@@ -1111,7 +1111,7 @@ float4 polychrome_sprite_fragment(PolychromeSpriteFragmentInput input): SV_Targe
     float distance = quad_sdf(input.position.xy, sprite.bounds, sprite.corner_radii);
 
     float4 color = sample;
-    if (sprite.grayscale) {
+    if ((sprite.grayscale & 0xFFu) != 0u) {
         float3 grayscale = dot(color.rgb, GRAYSCALE_FACTORS);
         color = float4(grayscale, sample.a);
     }