diff --git a/Formula/gz-math8.rb b/Formula/gz-math8.rb
index 66147aa2c..ab2c35eb6 100644
--- a/Formula/gz-math8.rb
+++ b/Formula/gz-math8.rb
@@ -1,7 +1,7 @@
 class GzMath8 < Formula
   desc "Math API for robotic applications"
   homepage "https://gazebosim.org"
-  url "https://github.com/gazebosim/gz-math.git", branch: "main"
+  url "https://github.com/gazebosim/gz-math.git", branch: "scpeters/revert_606"
   version "7.999.999-0-20231006"
   license "Apache-2.0"
 
diff --git a/Formula/sdformat15.rb b/Formula/sdformat15.rb
index ce1a32b3a..cc2647b9f 100644
--- a/Formula/sdformat15.rb
+++ b/Formula/sdformat15.rb
@@ -1,7 +1,7 @@
 class Sdformat15 < Formula
   desc "Simulation Description Format"
   homepage "http://sdformat.org"
-  url "https://github.com/gazebosim/sdformat.git", branch: "main"
+  url "https://github.com/gazebosim/sdformat.git", branch: "scpeters/revert_1458"
   version "14.999.999-0-20231016"
   license "Apache-2.0"