--- ./tools/Makefile.inc.unix.orig	2015-10-03 02:32:14 UTC
+++ ./tools/Makefile.inc.unix
@@ -5,8 +5,8 @@
 CAMLP5_COMM=TOP=$(TOP) $(TOP)/tools/caml
 CAMLP5F=-DUNIX
 CAMLP5D=+camlp5
 LIBUNIX=-cclib -lunix
-OCAMLC=ocamlc.opt -warn-error A
-OCAMLOPT=ocamlopt.opt -warn-error A
+OCAMLC=ocamlc.opt -warn-error "+A-d"
+OCAMLOPT=ocamlopt.opt -warn-error "+A-d"
 OCAMLI=
 OCAMLD=
 STRIP=strip