diff --git a/contrib/ChangeLog b/contrib/ChangeLog
index a88e2f06b508..cf6e03e4e1de 100644
--- a/contrib/ChangeLog
+++ b/contrib/ChangeLog
@@ -1,3 +1,7 @@
+2018-01-29  Jonathan Wakely  <jwakely@redhat.com>
+
+	* download_prerequisites: Use shasum for FreeBSD and DragonFly.
+
 2018-01-19  Martin Liska  <mliska@suse.cz>
 
 	* analyze_brprob.py: Support new format that can be easily
diff --git a/contrib/download_prerequisites b/contrib/download_prerequisites
index ae0b5ffeb322..b50f47cda795 100755
--- a/contrib/download_prerequisites
+++ b/contrib/download_prerequisites
@@ -47,7 +47,7 @@ force=0
 OS=$(uname)
 
 case $OS in
-  "Darwin")
+  "Darwin"|"FreeBSD"|"DragonFly")
     chksum='shasum -a 512 --check'
   ;;
   *)