diff --git a/sql/pgpool-recovery/pgpool-recovery.c b/sql/pgpool-recovery/pgpool-recovery.c
index 8408e3f..9742031 100644
--- a/sql/pgpool-recovery/pgpool-recovery.c
+++ b/sql/pgpool-recovery/pgpool-recovery.c
@@ -198,7 +198,7 @@ get_function_oid(const char *funcname, const char *argtype, const char *nspname)
 		oid_v = buildoidvector(NULL, 0);
 	}
 
-	nspid = LookupExplicitNamespace(nspname);
+	nspid = LookupExplicitNamespace(nspname, false);
 	elog(DEBUG1, "get_function_oid: oid of \"%s\": %d", nspname, nspid);
 
 	tup = SearchSysCache(PROCNAMEARGSNSP,