diff --git a/src/Npgsql/Schema/DbColumnSchemaGenerator.cs b/src/Npgsql/Schema/DbColumnSchemaGenerator.cs
index ed7afd822b..e41ede3101 100644
--- a/src/Npgsql/Schema/DbColumnSchemaGenerator.cs
+++ b/src/Npgsql/Schema/DbColumnSchemaGenerator.cs
@@ -39,7 +39,7 @@ CASE WHEN atthasdef THEN (SELECT pg_get_expr(adbin, cls.oid) FROM pg_attrdef WHE
      CASE WHEN ((cls.relkind = ANY (ARRAY['r'::""char"", 'p'::""char""]))
                OR ((cls.relkind = ANY (ARRAY['v'::""char"", 'f'::""char""]))
                AND pg_column_is_updatable((cls.oid)::regclass, attr.attnum, false)))
-  	           AND attr.attidentity NOT IN ('a') THEN 'true'::boolean
+  	           {(pgVersion.IsGreaterOrEqual(10) ? "AND attr.attidentity NOT IN ('a')" : "")} THEN 'true'::boolean
                ELSE 'false'::boolean
                END AS is_updatable,
      EXISTS (