diff --git a/drmhwctwo.cpp b/drmhwctwo.cpp
index ede75e0..1940964 100644
--- a/drmhwctwo.cpp
+++ b/drmhwctwo.cpp
@@ -830,7 +830,7 @@
   layer->acquire_fence = acquire_fence_.Release();
   layer->release_fence = std::move(release_fence);
   layer->SetDisplayFrame(display_frame_);
-  layer->alpha = static_cast<uint8_t>(255.0f * alpha_ + 0.5f);
+  layer->alpha = static_cast<uint16_t>(65535.0f * alpha_ + 0.5f);
   layer->SetSourceCrop(source_crop_);
   layer->SetTransform(static_cast<int32_t>(transform_));
 }