diff --git a/compositor/LayerData.h b/compositor/LayerData.h
index 127b3ff..962141f 100644
--- a/compositor/LayerData.h
+++ b/compositor/LayerData.h
@@ -60,9 +60,11 @@
   std::optional<IRect> i_rect;
 };
 
+constexpr float kAlphaOpaque = 1.0F;
+
 struct PresentInfo {
   LayerTransform transform{};
-  uint16_t alpha = UINT16_MAX;
+  float alpha = kAlphaOpaque;
   SrcRectInfo source_crop{};
   DstRectInfo display_frame{};