diff --git a/src/libextra/sort.rs b/src/libextra/sort.rs
index 5377dfadbaa1..6befd49e8afd 100644
--- a/src/libextra/sort.rs
+++ b/src/libextra/sort.rs
@@ -1202,7 +1202,7 @@ mod big_tests {
 
     struct LVal<'self> {
         val: uint,
-        key: &'self fn(@uint),
+        key: &'self fn:Copy(@uint),
     }
 
     #[unsafe_destructor]
diff --git a/src/libstd/local_data.rs b/src/libstd/local_data.rs
index 33b4e3f1963a..c5f2c8ae584d 100644
--- a/src/libstd/local_data.rs
+++ b/src/libstd/local_data.rs
@@ -46,7 +46,7 @@ use task::local_data_priv::{local_get, local_pop, local_modify, local_set, Handl
  *
  * These two cases aside, the interface is safe.
  */
-pub type LocalDataKey<'self,T> = &'self fn(v: @T);
+pub type LocalDataKey<'self,T> = &'self fn:Copy(v: @T);
 
 /**
  * Remove a task-local data value from the table, returning the
diff --git a/src/libsyntax/ast_util.rs b/src/libsyntax/ast_util.rs
index 6761736d2f37..7ea19611b51b 100644
--- a/src/libsyntax/ast_util.rs
+++ b/src/libsyntax/ast_util.rs
@@ -704,7 +704,7 @@ pub fn new_sctable_internal() -> SCTable {
 pub fn get_sctable() -> @mut SCTable {
     unsafe {
         let sctable_key = (cast::transmute::<(uint, uint),
-                           &fn(v: @@mut SCTable)>(
+                           &fn:Copy(v: @@mut SCTable)>(
                                (-4 as uint, 0u)));
         match local_data::local_data_get(sctable_key) {
             None => {
diff --git a/src/libsyntax/parse/token.rs b/src/libsyntax/parse/token.rs
index 793626f0e180..c98062cf3bd7 100644
--- a/src/libsyntax/parse/token.rs
+++ b/src/libsyntax/parse/token.rs
@@ -484,7 +484,7 @@ pub fn get_ident_interner() -> @ident_interner {
     unsafe {
         let key =
             (cast::transmute::<(uint, uint),
-             &fn(v: @@::parse::token::ident_interner)>(
+             &fn:Copy(v: @@::parse::token::ident_interner)>(
                  (-3 as uint, 0u)));
         match local_data::local_data_get(key) {
             Some(interner) => *interner,