diff -ur ocamlnet-3.5.1.old/src/netstring/Makefile.def ocamlnet-3.5.1/src/netstring/Makefile.def
--- ocamlnet-3.5.1.old/src/netstring/Makefile.def	2012-02-29 18:02:52.000000000 +0000
+++ ocamlnet-3.5.1/src/netstring/Makefile.def	2012-06-09 15:43:13.893064261 +0100
@@ -13,7 +13,7 @@
 PKGNAME  = netstring
 
 REQUIRES = $(REGEXP_PROVIDER) bigarray
-INCLUDES += $(INC_NETSYS)
+INCLUDES += $(INC_NETSYS) -I +compiler-libs
 
 ISO_MAPPINGS   = mappings/iso*.unimap
 JP_MAPPINGS    = mappings/jis*.*map
diff -ur ocamlnet-3.5.1.old/src/netsys/netsys_posix.ml ocamlnet-3.5.1/src/netsys/netsys_posix.ml
--- ocamlnet-3.5.1.old/src/netsys/netsys_posix.ml	2012-02-29 18:02:52.000000000 +0000
+++ ocamlnet-3.5.1/src/netsys/netsys_posix.ml	2012-06-09 15:40:03.404669934 +0100
@@ -704,7 +704,7 @@
 (* The stubs assume these type definitions: *)
 type open_flag1 = Unix.open_flag =
     O_RDONLY | O_WRONLY | O_RDWR | O_NONBLOCK | O_APPEND | O_CREAT | O_TRUNC
-  | O_EXCL | O_NOCTTY | O_DSYNC | O_SYNC | O_RSYNC
+  | O_EXCL | O_NOCTTY | O_DSYNC | O_SYNC | O_RSYNC | O_SHARE_DELETE
 
 type access_permission1 = Unix.access_permission =
     R_OK | W_OK | X_OK | F_OK