Latex page number displays lower left, not lower right

H开发者_开发问答ello I have this code, but the page numbers appear lower left, how do I tell it to be lower right?

%\beamerdefaultoverlayspecification{<+->}
\setbeamertemplate{footline}[text line]{\insertframenumber}

If you use:

\setbeamertemplate{footline}[page number]

the page numbers will appear bottom right