diff --git a/intel-sgx/async-usercalls/src/callback.rs b/intel-sgx/async-usercalls/src/callback.rs
index ea5d969b..3194fa3d 100644
--- a/intel-sgx/async-usercalls/src/callback.rs
+++ b/intel-sgx/async-usercalls/src/callback.rs
@@ -1,4 +1,4 @@
-use fortanix_sgx_abi::{invoke_with_usercalls, Fd, Result};
+use fortanix_sgx_abi::{invoke_with_usercalls, Fd, Result, InsecureTimeInfo};
 use std::io;
 use std::os::fortanix_sgx::usercalls::raw::{Return, ReturnValue};
 use std::os::fortanix_sgx::usercalls::FromSgxResult;
@@ -21,21 +21,23 @@ impl<F, T> From<F> for CbFn<T>
 }
 
 macro_rules! cbfn_type {
-    ( )                      => { CbFn<()> };
-    ( -> ! )                 => { () };
-    ( -> u64 )               => { CbFn<u64> };
-    ( -> (Result, usize) )   => { CbFn<io::Result<usize>> };
-    ( -> (Result, u64) )     => { CbFn<io::Result<u64>> };
-    ( -> (Result, Fd) )      => { CbFn<io::Result<Fd>> };
-    ( -> (Result, *mut u8) ) => { CbFn<io::Result<*mut u8>> };
-    ( -> Result )            => { CbFn<io::Result<()>> };
+    ( )                                   => { CbFn<()> };
+    ( -> ! )                              => { () };
+    ( -> u64 )                            => { CbFn<u64> };
+    ( -> (u64, *const InsecureTimeInfo) ) => { CbFn<(u64, *const InsecureTimeInfo)> };
+    ( -> (Result, usize) )                => { CbFn<io::Result<usize>> };
+    ( -> (Result, u64) )                  => { CbFn<io::Result<u64>> };
+    ( -> (Result, Fd) )                   => { CbFn<io::Result<Fd>> };
+    ( -> (Result, *mut u8) )              => { CbFn<io::Result<*mut u8>> };
+    ( -> Result )                         => { CbFn<io::Result<()>> };
 }
 
 macro_rules! call_cbfn {
-    ( $cb:ident, $rv:expr, )          => { let x: () = $rv; $cb.call(x); };
-    ( $cb:ident, $rv:expr, -> ! )     => { let _: ! = $rv; };
-    ( $cb:ident, $rv:expr, -> u64 )   => { let x: u64 = $rv; $cb.call(x); };
-    ( $cb:ident, $rv:expr, -> $t:ty ) => { let x: $t = $rv; $cb.call(x.from_sgx_result()); };
+    ( $cb:ident, $rv:expr, )                                   => { let x: () = $rv; $cb.call(x); };
+    ( $cb:ident, $rv:expr, -> ! )                              => { let _: ! = $rv; };
+    ( $cb:ident, $rv:expr, -> u64 )                            => { let x: u64 = $rv; $cb.call(x); };
+    ( $cb:ident, $rv:expr, -> (u64, *const InsecureTimeInfo) ) => { let x: (u64, *const InsecureTimeInfo) = $rv; $cb.call(x); };
+    ( $cb:ident, $rv:expr, -> $t:ty )                          => { let x: $t = $rv; $cb.call(x.from_sgx_result()); };
 }
 
 macro_rules! define_callback {
diff --git a/intel-sgx/async-usercalls/src/provider_api.rs b/intel-sgx/async-usercalls/src/provider_api.rs
index 304c4101..3ab70a29 100644
--- a/intel-sgx/async-usercalls/src/provider_api.rs
+++ b/intel-sgx/async-usercalls/src/provider_api.rs
@@ -3,7 +3,7 @@ use crate::io_bufs::UserBuf;
 use crate::raw::RawApi;
 use crate::utils::MakeSend;
 use crate::{AsyncUsercallProvider, CancelHandle};
-use fortanix_sgx_abi::Fd;
+use fortanix_sgx_abi::{Fd, InsecureTimeInfo};
 use std::io;
 use std::mem::{self, ManuallyDrop};
 use std::net::{TcpListener, TcpStream};
@@ -251,11 +251,17 @@ impl AsyncUsercallProvider {
     /// callbacks.
     pub fn insecure_time<F>(&self, callback: F)
         where
-            F: FnOnce(SystemTime) + Send + 'static,
+            F: FnOnce((SystemTime, Option<InsecureTimeInfo>)) + Send + 'static,
     {
-        let cb = move |nanos_since_epoch| {
+        let cb = move |(nanos_since_epoch, insecure_time_info_ptr): (u64, *const InsecureTimeInfo)| {
             let t = UNIX_EPOCH + Duration::from_nanos(nanos_since_epoch);
-            callback(t);
+            let maybe_insecure_time_info = if insecure_time_info_ptr.is_null() {
+                // Safety: The caller must ensure that ptr is non-null and valid.
+                None
+            } else {
+                unsafe { Some(*insecure_time_info_ptr) }
+            };
+            callback((t, maybe_insecure_time_info));
         };
         unsafe {
             self.raw_insecure_time(Some(cb.into()));
diff --git a/intel-sgx/async-usercalls/src/raw.rs b/intel-sgx/async-usercalls/src/raw.rs
index e66e5a35..ae511b16 100644
--- a/intel-sgx/async-usercalls/src/raw.rs
+++ b/intel-sgx/async-usercalls/src/raw.rs
@@ -1,6 +1,6 @@
 use crate::callback::*;
 use crate::{AsyncUsercallProvider, CancelHandle};
-use fortanix_sgx_abi::Fd;
+use fortanix_sgx_abi::{Fd, InsecureTimeInfo};
 use std::io;
 use std::os::fortanix_sgx::usercalls::raw::ByteBuffer;
 use std::os::fortanix_sgx::usercalls::raw::{Usercall, UsercallNrs};
@@ -51,7 +51,7 @@ pub trait RawApi {
         callback: Option<CbFn<io::Result<Fd>>>,
     ) -> CancelHandle;
 
-    unsafe fn raw_insecure_time(&self, callback: Option<CbFn<u64>>);
+    unsafe fn raw_insecure_time(&self, callback: Option<CbFn<(u64, *const InsecureTimeInfo)>>);
 
     unsafe fn raw_alloc(&self, size: usize, alignment: usize, callback: Option<CbFn<io::Result<*mut u8>>>);
 
@@ -137,7 +137,7 @@ impl RawApi for AsyncUsercallProvider {
         self.send_usercall(u, callback.map(|cb| Callback::connect_stream(cb)))
     }
 
-    unsafe fn raw_insecure_time(&self, callback: Option<CbFn<u64>>) {
+    unsafe fn raw_insecure_time(&self, callback: Option<CbFn<(u64, *const InsecureTimeInfo)>>) {
         let u = Usercall(UsercallNrs::insecure_time as _, 0, 0, 0, 0);
         self.send_usercall(u, callback.map(|cb| Callback::insecure_time(cb)));
     }
@@ -172,7 +172,7 @@ mod tests {
             let (tx, rx) = mpmc::bounded(N);
             for _ in 0..N {
                 let tx = tx.clone();
-                let cb = move |d| {
+                let cb = move |(d, _)| {
                     let system_time = UNIX_EPOCH + Duration::from_nanos(d);
                     tx.send(system_time).unwrap();
                 };