diff --git a/src/libcore/hash/mod.rs b/src/libcore/hash/mod.rs
index e848a44e01ce0..d4033d1aa8b31 100644
--- a/src/libcore/hash/mod.rs
+++ b/src/libcore/hash/mod.rs
@@ -232,7 +232,6 @@ mod impls {
     impl Hash for str {
         fn hash<H: Hasher>(&self, state: &mut H) {
             state.write(self.as_bytes());
-            state.write_u8(0xff)
         }
     }