1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstd/sys/windows/mutex.rs b/src/libstd/sys/windows/mutex.rs
index b770156582d..8762b34e3da 100644
--- a/src/libstd/sys/windows/mutex.rs
+++ b/src/libstd/sys/windows/mutex.rs
@@ -64,6 +64,8 @@ impl Mutex {
             held: UnsafeCell::new(false),
         }
     }
+    #[inline]
+    pub unsafe fn init(&mut self) {}
     pub unsafe fn lock(&self) {
         match kind() {
             Kind::SRWLock => c::AcquireSRWLockExclusive(raw(self)),