diff --git a/servers/slapd/back-bdb/back-bdb.h b/servers/slapd/back-bdb/back-bdb.h
index 4db9b13572..df8125be6c 100644
--- a/servers/slapd/back-bdb/back-bdb.h
+++ b/servers/slapd/back-bdb/back-bdb.h
@@ -271,6 +271,10 @@ struct bdb_op_info {
 
 #endif
 
+#ifndef DB_BUFFER_SMALL
+#define DB_BUFFER_SMALL			ENOMEM
+#endif
+
 #define BDB_REUSE_LOCKERS
 
 #define BDB_CSN_COMMIT	0