diff --git a/src/pyob/xml_mixin.py b/src/pyob/xml_mixin.py
index eb70fc4..d6511b9 100644
--- a/src/pyob/xml_mixin.py
+++ b/src/pyob/xml_mixin.py
@@ -271,7 +271,7 @@ def _attempt_regex_fuzzy_match(
         self, source: str, clean_search: str, replace: str
     ) -> tuple[str, bool]:
         try:
-            search_lines_cleaned = [
+            search_lines_cleaned: list[str] = [
                 line.strip() for line in clean_search.split("\n") if line.strip()
             ]
             if not search_lines_cleaned: