diff --git a/invesalius/data/styles.py b/invesalius/data/styles.py
index cc0eb1b..56776a1 100644
--- a/invesalius/data/styles.py
+++ b/invesalius/data/styles.py
@@ -579,6 +579,7 @@ class EditorInteractorStyle(DefaultInteractorStyle):
 
         self.AddObserver("LeftButtonPressEvent", self.OnBrushClick)
         self.AddObserver("LeftButtonReleaseEvent", self.OnBrushRelease)
+        self.RemoveObservers("MouseMoveEvent")
         self.AddObserver("MouseMoveEvent", self.OnBrushMove)
 
         self.RemoveObservers("MouseWheelForwardEvent")
--
libgit2 0.21.2