Parent->Child, sizing problem

‘image’ is a bitmap, ‘frame’ is a movieclip with a stroke in it.

image.scaleX = 1.2;
image.scaleY = 1.2;	
frame.width = image.width;
frame.height = image.height;
frame.addChild(image);

The problem is that the dimensions between the two arent matching once I add the child. Any idea what’s goin on?