diff --git a/Formula/b/biosig.rb b/Formula/b/biosig.rb
index 5ea750c9c0875..79de68f1618e8 100644
--- a/Formula/b/biosig.rb
+++ b/Formula/b/biosig.rb
@@ -4,6 +4,7 @@ class Biosig < Formula
   url "https://downloads.sourceforge.net/project/biosig/BioSig%20for%20C_C%2B%2B/src/biosig-2.6.1.src.tar.xz"
   sha256 "558ee17cd7b4aa1547e98e52bb85cccccb7f7a81600f9bef3a50cd5b34d0729e"
   license "GPL-3.0-or-later"
+  revision 1
 
   livecheck do
     url :stable