diff --git a/Formula/hfstospell.rb b/Formula/hfstospell.rb
index 90095060d14..2d578ddb69a 100644
--- a/Formula/hfstospell.rb
+++ b/Formula/hfstospell.rb
@@ -4,6 +4,7 @@ class Hfstospell < Formula
   url "https://github.com/hfst/hfst-ospell/releases/download/v0.5.2/hfst-ospell-0.5.2.tar.bz2"
   sha256 "ab9ccf3c2165c0efd8dd514e0bf9116e86a8a079d712c0ed6c2fabf0052e9aa4"
   license "Apache-2.0"
+  revision 1
 
   livecheck do
     url :stable