diff --git a/bin/setfacl/mask.c b/bin/setfacl/mask.c
index 0851be1bff23..d81cfb686085 100644
--- a/bin/setfacl/mask.c
+++ b/bin/setfacl/mask.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001 Chris D. Faulhaber
+ * Copyright (c) 2001-2002 Chris D. Faulhaber
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,7 +41,7 @@
 int
 set_acl_mask(acl_t *prev_acl)
 {
-	acl_entry_t entry;
+	acl_entry_t entry, entry_new;
 	acl_t acl;
 	acl_tag_t tag;
 	int entry_id;
@@ -104,7 +104,20 @@ set_acl_mask(acl_t *prev_acl)
 		return (0);
 	}
 
-	**prev_acl = *acl;
+	acl_free(*prev_acl);
+	*prev_acl = acl_init(ACL_MAX_ENTRIES);
+	if (*prev_acl == NULL)
+		err(1, "acl_init() failed");
+
+	entry_id = ACL_FIRST_ENTRY;
+	while (acl_get_entry(acl, entry_id, &entry) == 1) {
+		entry_id = ACL_NEXT_ENTRY;
+		if (acl_create_entry(prev_acl, &entry_new) == -1)
+			err(1, "acl_create_entry() failed");
+		if (acl_copy_entry(entry_new, entry) == -1)
+			err(1, "acl_copy_entry() failed");
+	}
+
 	acl_free(acl);
 
 	return (0);