diff --git a/src/build_helper/src/git.rs b/src/build_helper/src/git.rs
index 8f0b67ddbd369..3ef9c7ac35e9d 100644
--- a/src/build_helper/src/git.rs
+++ b/src/build_helper/src/git.rs
@@ -154,6 +154,7 @@ pub fn get_closest_merge_commit(
         "rev-list",
         &format!("--author={}", config.git_merge_commit_email),
         "-n1",
+        "--first-parent",
         &merge_base,
     ]);