diff --git a/postgres.cc b/postgres.cc
index 4b6f64c..028f630 100644
--- a/postgres.cc
+++ b/postgres.cc
@@ -139,7 +139,8 @@ schema_pqxx::schema_pqxx(std::string &conninfo, bool no_catalog, bool dump_state
     }
     r = w.exec("select typname, "
                "oid, ',' as typdelim, typrelid, typelem, typarray, typtype "
-               "from pg_type ");
+               "from pg_type "
+               "where typname <> '%in'");
     for (auto row = r.begin(); row != r.end(); ++row) {
       string name(row[0].as<string>());
       OID oid(row[1].as<OID>());