diff --git a/lib/libc/posix1e/acl_entry.c b/lib/libc/posix1e/acl_entry.c
index 49dfb841443c..cfb5e8049c6f 100644
--- a/lib/libc/posix1e/acl_entry.c
+++ b/lib/libc/posix1e/acl_entry.c
@@ -34,9 +34,6 @@
 #include <errno.h>
 #include <stdlib.h>
 
-#define ACL_UNDEFINED_ID	-1
-#define ACL_UNDEFINED_TAG	-1
-
 int
 acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p)
 {
diff --git a/sys/sys/acl.h b/sys/sys/acl.h
index 79ae96805b15..ed49aa60c1b8 100644
--- a/sys/sys/acl.h
+++ b/sys/sys/acl.h
@@ -65,13 +65,14 @@ typedef struct acl	*acl_t;
 /*
  * Possible valid values for ae_tag field.
  */
-#define	ACL_USER_OBJ	0x00000001
-#define	ACL_USER	0x00000002
-#define	ACL_GROUP_OBJ	0x00000004
-#define	ACL_GROUP	0x00000008
-#define	ACL_MASK	0x00000010
-#define	ACL_OTHER	0x00000020
-#define	ACL_OTHER_OBJ	ACL_OTHER
+#define	ACL_UNDEFINED_TAG	0x00000000
+#define	ACL_USER_OBJ		0x00000001
+#define	ACL_USER		0x00000002
+#define	ACL_GROUP_OBJ		0x00000004
+#define	ACL_GROUP		0x00000008
+#define	ACL_MASK		0x00000010
+#define	ACL_OTHER		0x00000020
+#define	ACL_OTHER_OBJ		ACL_OTHER
 
 /*
  * Possible valid values for acl_type_t arguments.
@@ -93,6 +94,18 @@ typedef struct acl	*acl_t;
 #define	ACL_PERM_BITS		(ACL_EXECUTE | ACL_WRITE | ACL_READ)
 #define	ACL_POSIX1E_BITS	(ACL_EXECUTE | ACL_WRITE | ACL_READ)
 
+/*
+ * Possible entry_id values for acl_get_entry()
+ */
+#define        ACL_FIRST_ENTRY         0
+#define        ACL_NEXT_ENTRY          1
+
+/*
+ * Undefined value in ae_id field
+ */
+#define        ACL_UNDEFINED_ID        ((uid_t)-1)
+
+
 #ifdef _KERNEL
 
 /*