diff --git a/src/net/types.rs b/src/net/types.rs
index bcda0f987..853d6fbc9 100644
--- a/src/net/types.rs
+++ b/src/net/types.rs
@@ -1809,11 +1809,8 @@ fn test_sizes() {
     #[cfg(linux_kernel)]
     assert_eq_size!(UCred, libc::ucred);
 
-    // Linux added fields to `xdp_umem_reg` so it's bigger now.
-    /*
     #[cfg(target_os = "linux")]
     assert_eq_size!(super::xdp::XdpUmemReg, c::xdp_umem_reg);
-    */
     #[cfg(target_os = "linux")]
     assert_eq_size!(super::xdp::XdpOptions, c::xdp_options);
     #[cfg(target_os = "linux")]