diff --git a/src/NIF_IO.cpp b/src/NIF_IO.cpp
index 084b195c1c4ba754b4b4e4e3d41b1b68105c9a35..451e89c27e78002508e429fad859f324ac83c19c 100644
--- a/src/NIF_IO.cpp
+++ b/src/NIF_IO.cpp
@@ -537,7 +537,7 @@ void NifStream( Float4 const & val, ostream& out, const NifInfo & info ) {
 	WriteFloat( val.data[0], out );
 	WriteFloat( val.data[1], out );
 	WriteFloat( val.data[2], out );
-	WriteFloat( val.data[4], out );
+	WriteFloat( val.data[3], out );
 };
 
 //Matrix44