diff --git a/crates/ndc-sqlserver/src/configuration/version1.rs b/crates/ndc-sqlserver/src/configuration/version1.rs
index 7cad3fb3..9751824e 100644
--- a/crates/ndc-sqlserver/src/configuration/version1.rs
+++ b/crates/ndc-sqlserver/src/configuration/version1.rs
@@ -287,7 +287,7 @@ fn get_aggregate_functions_for_type(
             },
         );
         aggregate_functions.insert(
-            "AVG".to_string(),
+            "SUM".to_string(),
             database::AggregateFunction {
                 return_type: metadata::ScalarType(precise_return_type.to_string()),
             },