How to use .html_safe with || operator

I have the following piece of view code in my HAML template:

= yield(:great_view) || '<meta name="my-app" content="app-id=123, affiliate-data=, app-argument=">'

and adding .html_safe to the second operand doesn't display it correctly, but still escapes it. What am I doing wrong? Adding parentheses around both and writing ( .. || .. ).html-safe doesn't work either.