diff --git a/src/posix.rs b/src/posix/mod.rs
similarity index 100%
rename from src/posix.rs
rename to src/posix/mod.rs
diff --git a/src/sysv.rs b/src/sysv/mod.rs
similarity index 100%
rename from src/sysv.rs
rename to src/sysv/mod.rs