diff --git a/benches/swap.rs b/benches/swap.rs
index 227c107..18dbb1e 100644
--- a/benches/swap.rs
+++ b/benches/swap.rs
@@ -8,7 +8,7 @@ static mut ctx_slot: *mut Context = 0 as *mut Context;
 #[bench]
 fn swap(b: &mut test::Bencher) {
   unsafe {
-    let mut ctx = Context::new(move |:| {
+    let mut ctx = Context::new(move || {
       let ctx_ptr = ctx_slot;
       loop {
         (*ctx_ptr).swap()
diff --git a/src/main.rs b/src/main.rs
index e1cf924..af753a5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,7 +7,7 @@ static mut ctx_slot: *mut Context = 0 as *mut Context;
 
 fn main() {
   unsafe {
-    let mut ctx = Context::new(move |:| {
+    let mut ctx = Context::new(move || {
       println!("it's alive!");
       (*ctx_slot).swap();
     });