diff --git a/.buildkite/scripts/steps/esql_grammar_sync.sh b/.buildkite/scripts/steps/esql_grammar_sync.sh
index 2aa1144dce8c..cd86c27ad324 100755
--- a/.buildkite/scripts/steps/esql_grammar_sync.sh
+++ b/.buildkite/scripts/steps/esql_grammar_sync.sh
@@ -58,12 +58,9 @@ main () {
   rm -rf elasticsearch
   git clone https://github.com/elastic/elasticsearch --depth 1
 
-  rm -rf open-source
-  git clone https://github.com/elastic/open-source --depth 1
-
   cd "$KIBANA_DIR"
 
-  license_header=$(cat "$PARENT_DIR/open-source/legal/elastic-license-2.0-header.txt")
+  license_header=$(cat "$KIBANA_DIR/licenses/ELASTIC-LICENSE-2.0-HEADER.txt")
 
   report_main_step "Synchronizing lexer grammar..."
   synchronize_lexer_grammar "$license_header"
diff --git a/licenses/ELASTIC-LICENSE-2.0-HEADER.txt b/licenses/ELASTIC-LICENSE-2.0-HEADER.txt
new file mode 100644
index 000000000000..1fec1c76430e
--- /dev/null
+++ b/licenses/ELASTIC-LICENSE-2.0-HEADER.txt
@@ -0,0 +1,6 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */