diff --git a/nes/methods/horizontal_interpolation.py b/nes/methods/horizontal_interpolation.py
index ec3c2a9dcf76c9ba74ee32144d700581004b38fe..897327fb04b2f6b288a939e868a5568a6e7c0518 100644
--- a/nes/methods/horizontal_interpolation.py
+++ b/nes/methods/horizontal_interpolation.py
@@ -330,13 +330,13 @@ def get_weights_idx_xy_axis(self, dst_grid, weight_matrix_path, kind, n_neighbou
                 else:
                     weight_matrix = True
                 if kind in NEAREST_OPTS:
-                    if len(weight_matrix.lev['data']) != n_neighbours:
-                        warn("The selected weight matrix does not have the same number of nearest neighbours." +
-                             "Re-calculating again but not saving it.")
-                        if self.master:
+                    if self.master:
+                        if len(weight_matrix.lev['data']) != n_neighbours:
+                            warn("The selected weight matrix does not have the same number of nearest neighbours." +
+                                 "Re-calculating again but not saving it.")
                             weight_matrix = create_nn_weight_matrix(self, dst_grid, n_neighbours=n_neighbours)
-                        else:
-                            weight_matrix = True
+                    else:
+                        weight_matrix = True
             else:
                 if kind in NEAREST_OPTS:
                     if self.master: