diff --git a/neo/renderer/Model_gltf.cpp b/neo/renderer/Model_gltf.cpp
index 431b1eca..7894c9e8 100644
--- a/neo/renderer/Model_gltf.cpp
+++ b/neo/renderer/Model_gltf.cpp
@@ -480,6 +480,9 @@ void idRenderModelGLTF::ProcessNode( gltfNode* modelNode, idMat4 trans, gltfData
 	{
 		ProcessNode( nodeList[child], curTrans, data );
 	}
+
+	// derive mikktspace tangents from normals
+	FinishSurfaces( true );
 }
 
 //constructs a renderModel from a gltfScene node found in the "models" scene of the given gltfFile.