diff --git a/llvm/utils/gn/build/sync_source_lists_from_cmake.py b/llvm/utils/gn/build/sync_source_lists_from_cmake.py
--- a/llvm/utils/gn/build/sync_source_lists_from_cmake.py
+++ b/llvm/utils/gn/build/sync_source_lists_from_cmake.py
@@ -11,7 +11,7 @@
 
 If --write is passed, tries to write modified .gn files and adds one git
 commit for each cmake commit this merges. If an error is reported, the state
-of HEAD is unspecified; run `git reset --hard origin/master` if this happens.
+of HEAD is unspecified; run `git reset --hard origin/main` if this happens.
 """
 
 from __future__ import print_function