diff --git a/GPU/Directx9/TransformPipelineDX9.cpp b/GPU/Directx9/TransformPipelineDX9.cpp
index 05f037cd76..4413c04fd7 100644
--- a/GPU/Directx9/TransformPipelineDX9.cpp
+++ b/GPU/Directx9/TransformPipelineDX9.cpp
@@ -694,6 +694,7 @@ void TransformDrawEngineDX9::DoFlush() {
 							vai->numVerts = indexGen.VertexCount();
 							vai->prim = indexGen.Prim();
 							vai->maxIndex = indexGen.MaxIndex();
+							vai->flags = gstate_c.vertexFullAlpha ? VAI_FLAG_VERTEXFULLALPHA : 0;
 							useElements = !indexGen.SeenOnlyPurePrims();
 							if (!useElements && indexGen.PureCount()) {
 								vai->numVerts = indexGen.PureCount();