diff --git a/projects/gnu.org/gcc/package.yml b/projects/gnu.org/gcc/package.yml
index ad703ec5..955b4a52 100644
--- a/projects/gnu.org/gcc/package.yml
+++ b/projects/gnu.org/gcc/package.yml
@@ -81,6 +81,7 @@ build:
     BRANCH114: https://github.com/iains/gcc-11-branch/archive/refs/tags/gcc-11.4-darwin-r0.tar.gz
     BRANCH123: https://github.com/iains/gcc-12-branch/archive/refs/tags/gcc-12.3-darwin-r0.tar.gz
     BRANCH132: https://github.com/iains/gcc-13-branch/archive/refs/heads/gcc-13-2-darwin.tar.gz
+    BRANCH133: https://github.com/iains/gcc-13-branch/archive/refs/heads/gcc-13-3-darwin-pre-0.tar.gz
     BRANCH141: https://github.com/iains/gcc-14-branch/archive/refs/heads/gcc-14-1-darwin-pre-0.tar.gz
     ARGS:
       - --prefix={{ prefix }}