fix bug

diff --git a/include/deal.II/matrix_free/tensor_product_kernels.h b/include/deal.II/matrix_free/tensor_product_kernels.h
index f0f48b569b2e249a177959b6356f3390678ea68f..278a6d55337e8844afa0816d0a6f8b3469e976f3 100644 (file)
--- a/include/deal.II/matrix_free/tensor_product_kernels.h
+++ b/include/deal.II/matrix_free/tensor_product_kernels.h
@@ -487,7 +487,7 @@ namespace internal
                     if (add)
                       out[col * stride] += shape_values[col] * in[0];
                     else
-                      out[col * stride] += shape_values[col] * in[0];
+                      out[col * stride] = shape_values[col] * in[0];
                     if (max_derivative > 0)
                       out[col * stride] +=
                         shape_values[col + n_rows] * in[out_stride];