diff --git a/servers/slapd/back-bdb/back-bdb.h b/servers/slapd/back-bdb/back-bdb.h
index bd789d43cb..7fe656e32e 100644
--- a/servers/slapd/back-bdb/back-bdb.h
+++ b/servers/slapd/back-bdb/back-bdb.h
@@ -11,6 +11,7 @@
 #include <portable.h>
 #include "slap.h"
 #include <db.h>
+#undef const	/* db.h defines this?? */
 
 LDAP_BEGIN_DECL