diff --git a/mercurial.spec b/mercurial.spec
index 07578fa..9244efb 100644
--- a/mercurial.spec
+++ b/mercurial.spec
@@ -26,6 +26,7 @@ BuildRequires: python3-docutils
 Provides: hg = %{version}-%{release}
 Requires: python3
 Requires: emacs-filesystem
+Recommends: python3-fb-re2
 
 %description
 Mercurial is a fast, lightweight source control management system designed