diff --git a/src/gallium/drivers/d3d12/d3d12_compute_transforms.h b/src/gallium/drivers/d3d12/d3d12_compute_transforms.h
index 707bf52b0ba..12ae1630b9e 100644
--- a/src/gallium/drivers/d3d12/d3d12_compute_transforms.h
+++ b/src/gallium/drivers/d3d12/d3d12_compute_transforms.h
@@ -29,6 +29,9 @@
 
 enum class d3d12_compute_transform_type
 {
+   /* Extract vertex shader draw params (base vertex, instance, draw ID) from
+    * a stream of indirect draw (indexed) params
+    */
    base_vertex,
    max,
 };