diff --git a/quinn-udp/src/cmsg/mod.rs b/quinn-udp/src/cmsg/mod.rs
new file mode 100644
index 000000000..fd2884adf
--- /dev/null
+++ b/quinn-udp/src/cmsg/mod.rs
@@ -0,0 +1,5 @@
+#[cfg(unix)]
+#[path = "unix.rs"]
+mod imp;
+
+pub(crate) use imp::{decode, Aligned, Encoder, Iter};
diff --git a/quinn-udp/src/cmsg.rs b/quinn-udp/src/cmsg/unix.rs
similarity index 100%
rename from quinn-udp/src/cmsg.rs
rename to quinn-udp/src/cmsg/unix.rs