diff --git a/components/core/.clang-format b/components/core/.clang-format
index c8e66579c..35934f594 100644
--- a/components/core/.clang-format
+++ b/components/core/.clang-format
@@ -75,7 +75,7 @@ IncludeCategories:
   # Library headers. Update when adding new libraries.
   # NOTE: clang-format retains leading white-space on a line in violation of the YAML spec.
   - Regex: "<(absl|antlr4|archive|boost|bsoncxx|catch2|curl|date|fmt|json|log_surgeon|mariadb\
-|mongocxx|msgpack|outcome|simdjson|spdlog|sqlite3|string_utils|yaml-cpp|zstd)"
+|mongocxx|msgpack|outcome|regex_utils|simdjson|spdlog|sqlite3|string_utils|yaml-cpp|zstd)"
     Priority: 3
   # C system headers
   - Regex: "^<.+\\.h>"