diff -Nru ruby-json-2.1.0+dfsg/debian/changelog ruby-json-2.1.0+dfsg/debian/changelog
--- ruby-json-2.1.0+dfsg/debian/changelog	2017-07-18 20:31:09.000000000 +0000
+++ ruby-json-2.1.0+dfsg/debian/changelog	2018-02-20 22:15:00.000000000 +0000
@@ -1,3 +1,9 @@
+ruby-json (2.1.0+dfsg-1+rpi1) buster-staging; urgency=medium
+
+  * Add build-depends on ragel.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Tue, 20 Feb 2018 22:15:00 +0000
+
 ruby-json (2.1.0+dfsg-1) unstable; urgency=medium
 
   * New upstream version 2.1.0
diff -Nru ruby-json-2.1.0+dfsg/debian/control ruby-json-2.1.0+dfsg/debian/control
--- ruby-json-2.1.0+dfsg/debian/control	2017-07-18 20:31:09.000000000 +0000
+++ ruby-json-2.1.0+dfsg/debian/control	2018-02-20 22:14:51.000000000 +0000
@@ -10,7 +10,8 @@
                gem2deb (>= 0.35~),
                jruby,
                locales-all,
-               ruby-test-unit
+               ruby-test-unit,
+               ragel
 Standards-Version: 4.0.0
 Vcs-Git: https://anonscm.debian.org/git/pkg-ruby-extras/ruby-json.git
 Vcs-Browser: https://anonscm.debian.org/cgit/pkg-ruby-extras/ruby-json.git