diff --git a/Orange/widgets/unsupervised/owtsne.py b/Orange/widgets/unsupervised/owtsne.py
index 90491b72da4..3265bcdefe3 100644
--- a/Orange/widgets/unsupervised/owtsne.py
+++ b/Orange/widgets/unsupervised/owtsne.py
@@ -579,6 +579,8 @@ def enable_controls(self):
 
     def run(self):
         # Reset invalidated values as indicated by the flags
+        if self._invalidated.normalized_data:
+            self.normalized_data = None
         if self._invalidated.pca_projection:
             self.pca_projection = None
         if self._invalidated.affinities:
@@ -709,6 +711,9 @@ def on_done(self, task):
         self.run_button.setText("Start")
         # NOTE: All of these have already been set by on_partial_result,
         # we double-check that they are aliases
+        if task.normalized_data is not None:
+            self.__ensure_task_same_for_normalization(task)
+            assert task.normalized_data is self.normalized_data
         if task.pca_projection is not None:
             self.__ensure_task_same_for_pca(task)
             assert task.pca_projection is self.pca_projection