diff --git a/src/python/replay_merge.py b/src/python/replay_merge.py
index 3d8af10003..453fb642b3 100755
--- a/src/python/replay_merge.py
+++ b/src/python/replay_merge.py
@@ -277,6 +277,7 @@ def merge_replay(
     os.environ["PATH"] += os.pathsep + os.path.join(
         os.getcwd(), "src/scripts/merge_tools"
     )
+    os.environ["GIT_CONFIG_GLOBAL"] = os.getcwd() + "/.gitconfig"
 
     logger.info(f"Replaying merge with index {args.idx}")
     if args.delete_workdir: