diff --git a/build/xslt/fsfe_followupsection.xsl b/build/xslt/fsfe_followupsection.xsl
index f8a49e3d85..39ce21e5f5 100644
--- a/build/xslt/fsfe_followupsection.xsl
+++ b/build/xslt/fsfe_followupsection.xsl
@@ -69,8 +69,9 @@
https://my.fsfe.org/donate
btn
- fa fa-heart-o fa-lg
+ fa fa-heart-o fa-lg
+