diff --git a/CUDA/xfibres_gpu.h b/CUDA/xfibres_gpu.h
index bf9ca04ea92c93a84a5aa93a256d726701c965ae..57db109e61c82b48269c58755f39eb9b01689c70 100644
--- a/CUDA/xfibres_gpu.h
+++ b/CUDA/xfibres_gpu.h
@@ -16,8 +16,8 @@ void join_subParts(string name, int size_part, int nsubparts, int size_sub_part,
 
 void xfibres_gpu(	//INPUT
 			const NEWMAT::Matrix			datam,
-			const NEWMAT::Matrix			bvals,
 			const NEWMAT::Matrix			bvecs,
+			const NEWMAT::Matrix			bvals,
 			const NEWMAT::Matrix	 		gradm, 
 			int					idpart,
 			int					idSubpart,