diff --git a/metadata-ingestion/src/datahub/ingestion/source/tableau.py b/metadata-ingestion/src/datahub/ingestion/source/tableau.py
index a2e46cd0c8..0c2010f56e 100644
--- a/metadata-ingestion/src/datahub/ingestion/source/tableau.py
+++ b/metadata-ingestion/src/datahub/ingestion/source/tableau.py
@@ -920,7 +920,7 @@ class TableauSource(StatefulIngestionSourceBase):
             view_properties = ViewPropertiesClass(
                 materialized=False,
                 viewLanguage="SQL",
-                viewLogic=clean_query(csql.get("query", "")),
+                viewLogic=clean_query(csql.get("query") or ""),
             )
             dataset_snapshot.aspects.append(view_properties)
 
diff --git a/metadata-ingestion/src/datahub/ingestion/source/tableau_common.py b/metadata-ingestion/src/datahub/ingestion/source/tableau_common.py
index 3a33da17e1..1363207bd1 100644
--- a/metadata-ingestion/src/datahub/ingestion/source/tableau_common.py
+++ b/metadata-ingestion/src/datahub/ingestion/source/tableau_common.py
@@ -616,7 +616,7 @@ def get_unique_custom_sql(custom_sql_list: List[dict]) -> List[dict]:
     return unique_custom_sql
 
 
-def clean_query(query):
+def clean_query(query: str) -> str:
     """
     Clean special chars in query
     """