diff --git a/src/librustc/middle/trans/base.rs b/src/librustc/middle/trans/base.rs
index 99577efb14d6..c74f201091dd 100644
--- a/src/librustc/middle/trans/base.rs
+++ b/src/librustc/middle/trans/base.rs
@@ -510,7 +510,7 @@ pub fn set_no_split_stack(f: ValueRef) {
 
 // Double-check that we never ask LLVM to declare the same symbol twice. It
 // silently mangles such symbols, breaking our linkage model.
-pub fn note_unique_llvm_symbol(ccx: &CrateContext, sym: @str) {
+pub fn note_unique_llvm_symbol(ccx: &CrateContext, sym: ~str) {
     let mut all_llvm_symbols = ccx.all_llvm_symbols.borrow_mut();
     if all_llvm_symbols.get().contains(&sym) {
         ccx.sess.bug(~"duplicate LLVM symbol: " + sym);
diff --git a/src/librustc/middle/trans/context.rs b/src/librustc/middle/trans/context.rs
index 53f7b36b693f..2872d5566339 100644
--- a/src/librustc/middle/trans/context.rs
+++ b/src/librustc/middle/trans/context.rs
@@ -97,7 +97,7 @@ pub struct CrateContext {
      adt_reprs: RefCell<HashMap<ty::t, @adt::Repr>>,
      symbol_hasher: RefCell<Sha256>,
      type_hashcodes: RefCell<HashMap<ty::t, ~str>>,
-     all_llvm_symbols: RefCell<HashSet<@str>>,
+     all_llvm_symbols: RefCell<HashSet<~str>>,
      tcx: ty::ctxt,
      maps: astencode::Maps,
      stats: @Stats,
diff --git a/src/librustc/middle/trans/glue.rs b/src/librustc/middle/trans/glue.rs
index a601b16e9b25..8002559e3f9d 100644
--- a/src/librustc/middle/trans/glue.rs
+++ b/src/librustc/middle/trans/glue.rs
@@ -471,14 +471,14 @@ pub fn declare_tydesc(ccx: &CrateContext, t: ty::t) -> @tydesc_info {
 
     let llsize = llsize_of(ccx, llty);
     let llalign = llalign_of(ccx, llty);
-    let name = mangle_internal_name_by_type_and_seq(ccx, t, "tydesc").to_managed();
-    note_unique_llvm_symbol(ccx, name);
+    let name = mangle_internal_name_by_type_and_seq(ccx, t, "tydesc");
     debug!("+++ declare_tydesc {} {}", ppaux::ty_to_str(ccx.tcx, t), name);
     let gvar = name.with_c_str(|buf| {
         unsafe {
             llvm::LLVMAddGlobal(ccx.llmod, ccx.tydesc_type.to_ref(), buf)
         }
     });
+    note_unique_llvm_symbol(ccx, name);
 
     let ty_name = token::intern_and_get_ident(ppaux::ty_to_str(ccx.tcx, t));
     let ty_name = C_str_slice(ccx, ty_name);
@@ -499,10 +499,10 @@ pub fn declare_tydesc(ccx: &CrateContext, t: ty::t) -> @tydesc_info {
 fn declare_generic_glue(ccx: &CrateContext, t: ty::t, llfnty: Type,
                         name: &str) -> ValueRef {
     let _icx = push_ctxt("declare_generic_glue");
-    let fn_nm = mangle_internal_name_by_type_and_seq(ccx, t, (~"glue_" + name)).to_managed();
+    let fn_nm = mangle_internal_name_by_type_and_seq(ccx, t, ~"glue_" + name);
     debug!("{} is for type {}", fn_nm, ppaux::ty_to_str(ccx.tcx, t));
-    note_unique_llvm_symbol(ccx, fn_nm);
     let llfn = decl_cdecl_fn(ccx.llmod, fn_nm, llfnty, ty::mk_nil());
+    note_unique_llvm_symbol(ccx, fn_nm);
     return llfn;
 }