diff --git a/src/libextra/std.rc b/src/libextra/std.rc
index a23a547634242..6166e65f4f70f 100644
--- a/src/libextra/std.rc
+++ b/src/libextra/std.rc
@@ -123,7 +123,7 @@ pub mod serialize;
 // A curious inner-module that's not exported that contains the binding
 // 'extra' so that macro-expanded references to std::serialize and such
 // can be resolved within libextra.
-#[doc(hidden)] // FIXME #3538
+#[doc(hidden)]
 pub mod std {
     pub use serialize;
     pub use test;
@@ -134,7 +134,7 @@ pub mod std {
     pub use core::cmp;
     pub use core::sys;
 }
-#[doc(hidden)] // FIXME #3538
+#[doc(hidden)]
 pub mod extra {
     pub use serialize;
     pub use test;
diff --git a/src/libstd/num/cmath.rs b/src/libstd/num/cmath.rs
index a80703fafa3d2..9626224916bbb 100644
--- a/src/libstd/num/cmath.rs
+++ b/src/libstd/num/cmath.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#[doc(hidden)]; // FIXME #3538
-
 // function names are almost identical to C's libmath, a few have been
 // renamed, grep for "rename:"
 
diff --git a/src/libstd/stackwalk.rs b/src/libstd/stackwalk.rs
index 784656718d0d2..a22599e9fc620 100644
--- a/src/libstd/stackwalk.rs
+++ b/src/libstd/stackwalk.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#[doc(hidden)]; // FIXME #3538
-
 use cast::transmute;
 use unstable::intrinsics;
 
diff --git a/src/libstd/task/local_data_priv.rs b/src/libstd/task/local_data_priv.rs
index 2f97eaacf4be2..d3757ea3f4faf 100644
--- a/src/libstd/task/local_data_priv.rs
+++ b/src/libstd/task/local_data_priv.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#[doc(hidden)]; // FIXME #3538
-
 use cast;
 use cmp::Eq;
 use libc;
diff --git a/src/libstd/task/mod.rs b/src/libstd/task/mod.rs
index 490a69248eecb..f24d2327358be 100644
--- a/src/libstd/task/mod.rs
+++ b/src/libstd/task/mod.rs
@@ -195,7 +195,6 @@ pub fn task() -> TaskBuilder {
     }
 }
 
-#[doc(hidden)] // FIXME #3538
 priv impl TaskBuilder {
     fn consume(&mut self) -> TaskBuilder {
         if self.consumed {
diff --git a/src/libstd/task/rt.rs b/src/libstd/task/rt.rs
index 760812252bc73..4860ab36f7729 100644
--- a/src/libstd/task/rt.rs
+++ b/src/libstd/task/rt.rs
@@ -14,7 +14,7 @@ The task interface to the runtime
 
 */
 
-#[doc(hidden)]; // FIXME #3538
+#[doc(hidden)];
 
 use libc;
 
diff --git a/src/libstd/task/spawn.rs b/src/libstd/task/spawn.rs
index 81e5af5caab11..5941221821a85 100644
--- a/src/libstd/task/spawn.rs
+++ b/src/libstd/task/spawn.rs
@@ -70,7 +70,7 @@
  *
  ****************************************************************************/
 
-#[doc(hidden)]; // FIXME #3538
+#[doc(hidden)];
 
 use cast::transmute;
 use cast;
diff --git a/src/libstd/unicode.rs b/src/libstd/unicode.rs
index d6e2c5eee6aca..ce584c0f1ba6f 100644
--- a/src/libstd/unicode.rs
+++ b/src/libstd/unicode.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#[doc(hidden)]; // FIXME #3538
-
 // The following code was generated by "src/etc/unicode.py"
 
 pub mod general_category {