diff --git a/libcli/security/dom_sid.h b/libcli/security/dom_sid.h
index c4a417b64a6..cf3cedea679 100644
--- a/libcli/security/dom_sid.h
+++ b/libcli/security/dom_sid.h
@@ -53,6 +53,11 @@ extern const struct dom_sid global_sid_Builtin_Replicator;
 extern const struct dom_sid global_sid_Builtin_PreWin2kAccess;
 extern const struct dom_sid global_sid_Unix_Users;
 extern const struct dom_sid global_sid_Unix_Groups;
+extern const struct dom_sid global_sid_Unix_NFS;
+extern const struct dom_sid global_sid_Unix_NFS_Users;
+extern const struct dom_sid global_sid_Unix_NFS_Groups;
+extern const struct dom_sid global_sid_Unix_NFS_Mode;
+extern const struct dom_sid global_sid_Unix_NFS_Other;
 
 int dom_sid_compare_auth(const struct dom_sid *sid1,
 			 const struct dom_sid *sid2);
diff --git a/libcli/security/util_sid.c b/libcli/security/util_sid.c
index 8e42826fa7d..5127109de7e 100644
--- a/libcli/security/util_sid.c
+++ b/libcli/security/util_sid.c
@@ -96,6 +96,23 @@ const struct dom_sid global_sid_Unix_Users =			/* Unmapped Unix users */
 const struct dom_sid global_sid_Unix_Groups =			/* Unmapped Unix groups */
 { 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 
+/*
+ * http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
+ */
+const struct dom_sid global_sid_Unix_NFS =             /* MS NFS and Apple style */
+{ 1, 1, {0,0,0,0,0,5}, {88,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+const struct dom_sid global_sid_Unix_NFS_Users =		/* Unix uid, MS NFS and Apple style */
+{ 1, 2, {0,0,0,0,0,5}, {88,1,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+const struct dom_sid global_sid_Unix_NFS_Groups =		/* Unix gid, MS NFS and Apple style */
+{ 1, 2, {0,0,0,0,0,5}, {88,2,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+const struct dom_sid global_sid_Unix_NFS_Mode =			/* Unix mode */
+{ 1, 2, {0,0,0,0,0,5}, {88,3,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* Unused, left here for documentary purposes */
+#if 0
+const struct dom_sid global_sid_Unix_NFS_Other =		/* Unix other, MS NFS and Apple style */
+{ 1, 2, {0,0,0,0,0,5}, {88,4,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+#endif
+
 /* Unused, left here for documentary purposes */
 #if 0
 #define SECURITY_NULL_SID_AUTHORITY    0