diff --git a/src/libcore/str.rs b/src/libcore/str.rs
index cf996a8b254ca..fb62fc65b6d1e 100644
--- a/src/libcore/str.rs
+++ b/src/libcore/str.rs
@@ -2087,6 +2087,7 @@ pub trait StrSlice {
     fn escape_default() -> ~str;
     fn escape_unicode() -> ~str;
     pure fn to_unique() -> ~str;
+    pure fn to_managed() -> @str;
     pure fn char_at(i: uint) -> char;
 }
 
@@ -2198,6 +2199,14 @@ impl &str: StrSlice {
     #[inline]
     pure fn to_unique() -> ~str { self.slice(0, self.len()) }
 
+    #[inline]
+    pure fn to_managed() -> @str {
+        let v = at_vec::from_fn(self.len() + 1, |i| {
+            if i == self.len() { 0 } else { self[i] }
+        });
+        unsafe { ::cast::transmute(v) }
+    }
+
     #[inline]
     pure fn char_at(i: uint) -> char { char_at(self, i) }
 }
@@ -3175,4 +3184,10 @@ mod tests {
         assert escape_default(~"\U0001d4ea\r") == ~"\\U0001d4ea\\r";
     }
 
+    #[test]
+    fn test_to_managed() {
+        assert (~"abc").to_managed() == @"abc";
+        assert view("abcdef", 1, 5).to_managed() == @"bcde";
+    }
+
 }