diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index 3eb5b19de5902746994b5c30443412af603d54a7..5dc59197caf6655d46df14db31eb4d2852e538a4 100755
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -4880,11 +4880,8 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 
 	if (emissive)
 	{ //emissive faces are present, include emissive byte to preserve batching
-		simple_mask = simple_mask | LLVertexBuffer::MAP_EMISSIVE;
-		
-		// doing this seems to cause NORSPEC-304
-		//alpha_mask = alpha_mask | LLVertexBuffer::MAP_EMISSIVE;
-
+		simple_mask = simple_mask | LLVertexBuffer::MAP_EMISSIVE;		
+		alpha_mask = alpha_mask | LLVertexBuffer::MAP_EMISSIVE;
 		bump_mask = bump_mask | LLVertexBuffer::MAP_EMISSIVE;
 		fullbright_mask = fullbright_mask | LLVertexBuffer::MAP_EMISSIVE;
 		norm_mask = norm_mask | LLVertexBuffer::MAP_EMISSIVE;