diff --git a/src/receiver/fdtreceiver.rs b/src/receiver/fdtreceiver.rs
index 53234d0..be2c324 100644
--- a/src/receiver/fdtreceiver.rs
+++ b/src/receiver/fdtreceiver.rs
@@ -21,6 +21,7 @@ pub struct FdtReceiver {
     fdt_instance: Option<FdtInstance>,
     sender_current_time_offset: Option<std::time::Duration>,
     sender_current_time_late: bool,
+    pub ext_time: Option<std::time::SystemTime>,
     pub reception_start_time: SystemTime,
     enable_expired_check: bool,
     meta: Option<ObjectMetadata>,
@@ -96,11 +97,13 @@ impl FdtReceiver {
             reception_start_time: now,
             enable_expired_check,
             meta: None,
+            ext_time: None,
         }
     }
 
     pub fn push(&mut self, pkt: &alc::AlcPkt, now: std::time::SystemTime) {
         if let Ok(Some(res)) = alc::get_sender_current_time(pkt) {
+            self.ext_time = Some(now);
             if res < now {
                 self.sender_current_time_late = true;
                 self.sender_current_time_offset = Some(now.duration_since(res).unwrap())
diff --git a/src/receiver/receiver.rs b/src/receiver/receiver.rs
index 814ff52..a183a43 100644
--- a/src/receiver/receiver.rs
+++ b/src/receiver/receiver.rs
@@ -384,7 +384,6 @@ impl Receiver {
                     .duration_since(fdt_current.reception_start_time)
                     .unwrap_or(std::time::Duration::new(0, 0));
 
-                let ext_time = alc::get_sender_current_time(alc_pkt).unwrap_or(None);
                 self.writer.fdt_received(
                     &self.endpoint,
                     &self.tsi,
@@ -393,7 +392,7 @@ impl Receiver {
                     meta,
                     transfer_duration,
                     now,
-                    ext_time,
+                    fdt_current.ext_time,
                 );
             }
             self.fdt_current.push_front(fdt_current);