diff --git a/fsl/fslview/lightboxcanvas.py b/fsl/fslview/lightboxcanvas.py
index be50da35f77ae2893dde4df1ab7c41cd49dfb2c2..27a6d171d083482fa365ae4e03026dbae4a713f3 100644
--- a/fsl/fslview/lightboxcanvas.py
+++ b/fsl/fslview/lightboxcanvas.py
@@ -82,7 +82,7 @@ class LightBoxCanvas(slicecanvas.SliceCanvas):
         
     def canvasToWorld(self, xpos, ypos):
         """
-        Overwrites SliceCanvas.canvasToWorld. Given pixel x/y
+        Overrides SliceCanvas.canvasToWorld. Given pixel x/y
         coordinates on this canvas, translates them into the
         real world x/y/z coordinates of the displayed slice.
         Returns a 3-tuple containing the (x, y, z) coordinates
diff --git a/fsl/fslview/slicecanvas.py b/fsl/fslview/slicecanvas.py
index ca2a02274d79ead4bc2de2d9e8151e8e7f432179..895c88c1b165abef696339e88e7c09c6c4cad8fb 100644
--- a/fsl/fslview/slicecanvas.py
+++ b/fsl/fslview/slicecanvas.py
@@ -399,7 +399,7 @@ class SliceCanvas(wxgl.GLCanvas, props.HasProperties):
         # not yet been set. But draw() may be called mored than once
         # before _initGLData is called. Here, to prevent
         # _initGLData from running more than once, the first time
-        # it is called it simply overwrites itself with a dummy method.
+        # it is called it simply overrides itself with a dummy method.
         self._initGLData = lambda s: s
  
         self.glContext.SetCurrent(self)