diff --git a/skimage/viewer/canvastools/recttool.py b/skimage/viewer/canvastools/recttool.py
index 909763ab..dd6886c7 100644
--- a/skimage/viewer/canvastools/recttool.py
+++ b/skimage/viewer/canvastools/recttool.py
@@ -11,7 +11,7 @@ from skimage.viewer.canvastools.base import ToolHandles
 __all__ = ['RectangleTool']
 
 
-class RectangleTool(RectangleSelector, CanvasToolBase):
+class RectangleTool(CanvasToolBase, RectangleSelector):
     """Widget for selecting a rectangular region in a plot.
 
     After making the desired selection, press "Enter" to accept the selection