diff --git a/src/operator/numpy/np_matrix_op-inl.h b/src/operator/numpy/np_matrix_op-inl.h
index 41c60442e763..38af423b3d3a 100644
--- a/src/operator/numpy/np_matrix_op-inl.h
+++ b/src/operator/numpy/np_matrix_op-inl.h
@@ -1316,8 +1316,8 @@ void NumpyDiagonalOpImpl(const TBlob& in_data,
           stride1 + stride2, offset, oshape[odim - 1]);
       } else {
         Kernel<diag_n<3, req_type, back>, xpu>::Launch(s, dsize, out_data.dptr<DType>(),
-          in_data.dptr<DType>(), Shape3(oleading, obody, otrailing), Shape3(ileading, ibody, itrailing),
-          stride1 + stride2, offset, oshape[odim - 1]);
+          in_data.dptr<DType>(), Shape3(oleading, obody, otrailing),
+          Shape3(ileading, ibody, itrailing), stride1 + stride2, offset, oshape[odim - 1]);
       }
     });
   });
@@ -1342,7 +1342,8 @@ void NumpyDiagonalOpForward(const nnvm::NodeAttrs& attrs,
   const mxnet::TShape& oshape = outputs[0].shape_;
   const NumpyDiagonalParam& param = nnvm::get<NumpyDiagonalParam>(attrs.parsed);
 
-  NumpyDiagonalOpImpl<xpu, false>(in_data, out_data, ishape, oshape, out_data.Size(), param, s, req);
+  NumpyDiagonalOpImpl<xpu, false>(in_data, out_data, ishape, oshape,
+                                  out_data.Size(), param, s, req);
 }
 
 template<typename xpu>
@@ -1363,7 +1364,8 @@ void NumpyDiagonalOpBackward(const nnvm::NodeAttrs& attrs,
   const mxnet::TShape& oshape = outputs[0].shape_;
   const NumpyDiagonalParam& param = nnvm::get<NumpyDiagonalParam>(attrs.parsed);
 
-  NumpyDiagonalOpImpl<xpu, true>(in_data, out_data, oshape, ishape, in_data.Size(), param, s, req);
+  NumpyDiagonalOpImpl<xpu, true>(in_data, out_data, oshape, ishape,
+                                 in_data.Size(), param, s, req);
 }
 
 struct NumpyDiagflatParam : public dmlc::Parameter<NumpyDiagflatParam> {