diff --git a/be/src/vec/aggregate_functions/aggregate_function_map.h b/be/src/vec/aggregate_functions/aggregate_function_map.h
index e0a19a34207d80..bc065d5d8121b4 100644
--- a/be/src/vec/aggregate_functions/aggregate_function_map.h
+++ b/be/src/vec/aggregate_functions/aggregate_function_map.h
@@ -224,6 +224,7 @@ class AggregateFunctionMapAgg final
             Field key, value;
             columns[0]->get(i, key);
             if (key.is_null()) {
+                col.insert(Map {Array {}, Array {}});
                 continue;
             }