1 files changed, 2 insertions, 2 deletions
diff --git a/src/libstd/rand/os.rs b/src/libstd/rand/os.rs
index cd90af113ec..5558b8b3348 100644
--- a/src/libstd/rand/os.rs
+++ b/src/libstd/rand/os.rs
@@ -111,9 +111,9 @@ impl Rng for OSRng {
                                    pbBuffer: *mut BYTE);
         }
 
-        do v.as_mut_buf |ptr, len| {
+        v.as_mut_buf(|ptr, len| {
             unsafe {rust_win32_rand_gen(self.hcryptprov, len as DWORD, ptr)}
-        }
+        })
     }
 }