diff --git a/invesalius/data/styles.py b/invesalius/data/styles.py
index a79e4b4..f91be5a 100644
--- a/invesalius/data/styles.py
+++ b/invesalius/data/styles.py
@@ -276,7 +276,8 @@ class WWWLInteractorStyle(DefaultInteractorStyle):
 
     def CleanUp(self):
         self.viewer.on_wl = False
-        self.viewer.wl_text.Hide()
+        if self.viewer.wl_text is not None:
+            self.viewer.wl_text.Hide()
 
     def OnWindowLevelMove(self, obj, evt):
         if (self.left_pressed):
--
libgit2 0.21.2