diff --git a/wx/lib/floatcanvas/GUIMode.py b/wx/lib/floatcanvas/GUIMode.py
index aabfe7de..7e4c694e 100644
--- a/wx/lib/floatcanvas/GUIMode.py
+++ b/wx/lib/floatcanvas/GUIMode.py
@@ -374,7 +374,7 @@ class GUIZoomIn(ZoomWithMouseWheel, GUIBase):
             dc.DrawRectangle(*self.PrevRBBox)
 
     def OnRightDown(self, event):
-        self.Canvas.Zoom(1/1.5, event.GetPosition(), centerCoords="pixel")
+        self.Canvas.Zoom(1/1.5, event.GetPosition(), centerCoords="Pixel")
 
 
 class GUIZoomOut(ZoomWithMouseWheel, GUIBase):
@@ -386,10 +386,10 @@ class GUIZoomOut(ZoomWithMouseWheel, GUIBase):
         self.Cursor = self.Cursors.MagMinusCursor
 
     def OnLeftDown(self, event):
-        self.Canvas.Zoom(1/1.5, event.GetPosition(), centerCoords="pixel")
+        self.Canvas.Zoom(1/1.5, event.GetPosition(), centerCoords="Pixel")
 
     def OnRightDown(self, event):
-        self.Canvas.Zoom(1.5, event.GetPosition(), centerCoords="pixel")
+        self.Canvas.Zoom(1.5, event.GetPosition(), centerCoords="Pixel")
 
     def OnMove(self, event):
         # Always raise the Move event.