diff --git a/Sources/ContainerizationArchive/ArchiveReader.swift b/Sources/ContainerizationArchive/ArchiveReader.swift
index 0477d8e4..3c291d1a 100644
--- a/Sources/ContainerizationArchive/ArchiveReader.swift
+++ b/Sources/ContainerizationArchive/ArchiveReader.swift
@@ -398,7 +398,7 @@ extension ArchiveReader {
     }
 
     private func setFileAttributes(fd: Int32, entry: WriteEntry) {
-        fchmod(fd, entry.permissions)
+        fchmod(fd, entry.permissions & 0o777)
         if let owner = entry.owner, let group = entry.group {
             fchown(fd, owner, group)
         }