diff --git a/redis/commands/search/commands.py b/redis/commands/search/commands.py
index 5c4734c7c8..39c599fbd5 100644
--- a/redis/commands/search/commands.py
+++ b/redis/commands/search/commands.py
@@ -433,7 +433,7 @@ def search(
 
     def explain(
         self,
-        query=Union[str, Query],
+        query: Union[str, Query],
         query_params: Dict[str, Union[str, int, float]] = None,
     ):
         """Returns the execution plan for a complex query.