diff --git a/Dir.zig b/Dir.zig
index 4f85d2861b79e17ea9e6539feae86ac82d0df709..16e51c886496ec04b4218933432f1e4d2dce7189 100644
--- a/Dir.zig
+++ b/Dir.zig
@@ -453,3 +453,7 @@ pub fn copyFile(source_dir: Dir, source_path: [:0]const u8, dest_dir: Dir, dest_
         return;
     }
 }
+
+pub fn dup(self: Dir) !Dir {
+    return .{ .fd = @enumFromInt(try sys.dup(@intFromEnum(self.fd))) };
+}
diff --git a/File.zig b/File.zig
index 7516e2dfd7e9e744f2fae160cff0e6a1fbe9cd23..bd38bc736468627816e1a0d9e0fb430d6434cedf 100644
--- a/File.zig
+++ b/File.zig
@@ -230,3 +230,7 @@ pub fn realpathAlloc(self: File, allocator: std.mem.Allocator) ![:0]u8 {
     const actual = try self.realpath(&buf);
     return allocator.dupeZ(u8, actual);
 }
+
+pub fn dup(self: File) !File {
+    return .{ .fd = @enumFromInt(try sys.dup(@intFromEnum(self.fd))) };
+}