diff --git a/superset/views/core.py b/superset/views/core.py
index b8e47920428c6..20ec631fbf125 100755
--- a/superset/views/core.py
+++ b/superset/views/core.py
@@ -959,7 +959,7 @@ def save_or_overwrite_slice(
             slc = Slice(owners=[g.user] if g.user else [])
 
         form_data["adhoc_filters"] = self.remove_extra_filters(
-            form_data.get("adhoc_filters", [])
+            (form_data.get("adhoc_filters", []) or [])
         )
 
         assert slc