diff --git a/src/libcore/stackwalk.rs b/src/libcore/stackwalk.rs
index 955e486649b..ceb7eb575f5 100644
--- a/src/libcore/stackwalk.rs
+++ b/src/libcore/stackwalk.rs
@@ -80,7 +80,7 @@ fn breakpoint() {
     }
 }
 
-fn frame_address(f: &fn(++x: *u8)) {
+fn frame_address(f: &fn(x: *u8)) {
     unsafe {
         rusti::frame_address(f)
     }
@@ -95,7 +95,7 @@ pub mod rustrt {
 pub mod rusti {
     #[abi = "rust-intrinsic"]
     pub extern {
-        pub fn frame_address(f: &once fn(++x: *u8));
+        pub fn frame_address(f: &once fn(x: *u8));
     }
 }
 
diff --git a/src/libstd/ebml.rs b/src/libstd/ebml.rs
index 8b559295819..5855add7975 100644
--- a/src/libstd/ebml.rs
+++ b/src/libstd/ebml.rs
@@ -61,7 +61,6 @@ pub mod reader {
 
     use core::int;
     use core::io;
-    use core::ops;
     use core::prelude::*;
     use core::str;
     use core::vec;
diff --git a/src/libstd/net_tcp.rs b/src/libstd/net_tcp.rs
index c1743c98c9b..a47a53caab9 100644
--- a/src/libstd/net_tcp.rs
+++ b/src/libstd/net_tcp.rs
@@ -1281,7 +1281,7 @@ fn to_tcp_err(&self) -> TcpErrData {
 
 extern fn on_tcp_read_cb(stream: *uv::ll::uv_stream_t,
                     nread: libc::ssize_t,
-                    ++buf: uv::ll::uv_buf_t) {
+                    buf: uv::ll::uv_buf_t) {
     unsafe {
         debug!("entering on_tcp_read_cb stream: %? nread: %?",
                         stream, nread);