diff --git a/mod.zig b/mod.zig
index 465d99e1402c755fa0b8de29b1de962d6c675318..f6eb08c4446a8f66f3d550e0205341f0e615a9ec 100644
--- a/mod.zig
+++ b/mod.zig
@@ -3758,3 +3758,9 @@ pub fn copy_file_range(fd_int: c_int, off_in: ?*off_t, fd_out: c_int, off_out: ?
     std.debug.assert(rc >= 0);
     return @intCast(rc);
 }
+pub fn dup(fildes: c_int) !c_int {
+    const rc = libc.dup(fildes);
+    if (rc == -1) return errno.fromInt(errno.fromLibC());
+    std.debug.assert(rc >= 0);
+    return rc;
+}
diff --git a/test.zig b/test.zig
index ca5073c67465695fff974f36ea9f970cf8cc2deb..6337fb78040b7c39410ea1a5b4eb622d6767d5a1 100644
--- a/test.zig
+++ b/test.zig
@@ -83,4 +83,5 @@ test {
     _ = &linux.getcwd;
     _ = &linux.fchmod;
     _ = &linux.copy_file_range;
+    _ = &linux.dup;
 }