Forcing ‘(more…)’ in asides on post pages

I’ve implemented asides on my blog, and I like how I can use the ‘more’ tag in them like in normal posts. The issue I have is that when I’m viewing a single post, the ‘more’ tag is ignored. In the documentation on the ‘the_content()’ function, it says that this tag is ignored when a single post is displayed.

Is there anyway to force the more tag to always work when used in an aside?