diff --git a/Formula/protobuf-c.rb b/Formula/protobuf-c.rb
index 3586bc5749..6121bd7aa9 100644
--- a/Formula/protobuf-c.rb
+++ b/Formula/protobuf-c.rb
@@ -3,6 +3,7 @@ class ProtobufC < Formula
   homepage "https://github.com/protobuf-c/protobuf-c"
   url "https://github.com/protobuf-c/protobuf-c/releases/download/v1.3.1/protobuf-c-1.3.1.tar.gz"
   sha256 "51472d3a191d6d7b425e32b612e477c06f73fe23e07f6a6a839b11808e9d2267"
+  revision 1
 
   bottle do
     cellar :any