diff --git a/src/libcollections/string.rs b/src/libcollections/string.rs
index c1e093436c3..b5ed7e6a077 100644
--- a/src/libcollections/string.rs
+++ b/src/libcollections/string.rs
@@ -802,6 +802,12 @@ fn from_str(s: &str) -> Option<String> {
     }
 }
 
+/// Trait for converting a type to a string, consuming it in the process.
+pub trait IntoString {
+    /// Consume and convert to a string.
+    fn into_string(self) -> String;
+}
+
 /// Unsafe operations
 #[unstable = "waiting on raw module conventions"]
 pub mod raw {
diff --git a/src/libstd/ascii.rs b/src/libstd/ascii.rs
index 56b048c3187..923349b1bf7 100644
--- a/src/libstd/ascii.rs
+++ b/src/libstd/ascii.rs
@@ -21,8 +21,7 @@
 use option::{Option, Some, None};
 use slice::{SlicePrelude, AsSlice};
 use str::{Str, StrPrelude};
-use string::{mod, String};
-use to_string::IntoString;
+use string::{mod, String, IntoString};
 use vec::Vec;
 
 /// Datatype to hold one ascii character. It wraps a `u8`, with the highest bit always zero.
diff --git a/src/libstd/prelude.rs b/src/libstd/prelude.rs
index 47dd07081d0..a75c51b9f9f 100644
--- a/src/libstd/prelude.rs
+++ b/src/libstd/prelude.rs
@@ -76,14 +76,14 @@
 #[doc(no_inline)] pub use io::{Buffer, Writer, Reader, Seek};
 #[doc(no_inline)] pub use str::{Str, StrVector, StrPrelude};
 #[doc(no_inline)] pub use str::{IntoMaybeOwned, StrAllocating, UnicodeStrPrelude};
-#[doc(no_inline)] pub use to_string::{ToString, IntoString};
+#[doc(no_inline)] pub use to_string::ToString;
 #[doc(no_inline)] pub use tuple::{Tuple1, Tuple2, Tuple3, Tuple4};
 #[doc(no_inline)] pub use tuple::{Tuple5, Tuple6, Tuple7, Tuple8};
 #[doc(no_inline)] pub use tuple::{Tuple9, Tuple10, Tuple11, Tuple12};
 #[doc(no_inline)] pub use slice::{SlicePrelude, AsSlice, CloneSlicePrelude};
 #[doc(no_inline)] pub use slice::{VectorVector, PartialEqSlicePrelude, OrdSlicePrelude};
 #[doc(no_inline)] pub use slice::{CloneSliceAllocPrelude, OrdSliceAllocPrelude, SliceAllocPrelude};
-#[doc(no_inline)] pub use string::String;
+#[doc(no_inline)] pub use string::{IntoString, String};
 #[doc(no_inline)] pub use vec::Vec;
 
 // Reexported runtime types
diff --git a/src/libstd/to_string.rs b/src/libstd/to_string.rs
index 737e467f19c..327410b320d 100644
--- a/src/libstd/to_string.rs
+++ b/src/libstd/to_string.rs
@@ -25,12 +25,6 @@ pub trait ToString {
     fn to_string(&self) -> String;
 }
 
-/// Trait for converting a type to a string, consuming it in the process.
-pub trait IntoString {
-    /// Consume and convert to a string.
-    fn into_string(self) -> String;
-}
-
 impl<T: fmt::Show> ToString for T {
     fn to_string(&self) -> String {
         format!("{}", *self)