diff --git a/bin/brakeman b/bin/brakeman
index 4d6eb315d1cf2935f01bb9bacab093ee224f1a5c..6419928cfd9bb7e8db97a6f93b329b95af88f946 100755
--- a/bin/brakeman
+++ b/bin/brakeman
@@ -55,6 +55,9 @@ end
 if options[:previous_results_json]
   vulns = Brakeman.compare options.merge(:quiet => options[:quiet])
   puts JSON.pretty_generate(vulns)
+  if options[:exit_on_warn] and (vulns[:new].count + vulns[:fixed].count > 0)
+    exit Brakeman::Warnings_Found_Exit_Code
+  end
 else
   #Run scan and output a report
   tracker = Brakeman.run options.merge(:print_report => true, :quiet => options[:quiet])