Suggestion for previous/next post link

Hi.
I noticed that, when in a single post you can’t navigate to the previous/next post.
So, here is the code I used in /single.php line 108 to add the links.

	<div class="nav-links">
							<div class="nav-previous">
								<span><i class="fa fa-arrow-circle-left"></i><?php previous_post_link( '  %link', '%title', true ); ?></span>
							</div>
							<div class="nav-next">
								<span><?php next_post_link(' %link', '%title', true); ?>  <i class="fa fa-arrow-circle-right"></i></span>
							</div>
						</div>	

Bests
Lena