diff --git a/neqo-transport/src/connection/mod.rs b/neqo-transport/src/connection/mod.rs
index 38b3c75cad..2cbd8eeaad 100644
--- a/neqo-transport/src/connection/mod.rs
+++ b/neqo-transport/src/connection/mod.rs
@@ -1508,6 +1508,16 @@ impl Connection {
                         d.tos(),
                     );
 
+                    #[cfg(feature = "build-fuzzing-corpus")]
+                    if packet.packet_type() == PacketType::Initial {
+                        let target = if self.role == Role::Client {
+                            "server_initial"
+                        } else {
+                            "client_initial"
+                        };
+                        neqo_common::write_item_to_fuzzing_corpus(target, &payload);
+                    }
+
                     qlog::packet_received(&mut self.qlog, &packet, &payload);
                     let space = PacketNumberSpace::from(payload.packet_type());
                     if self.acks.get_mut(space).unwrap().is_duplicate(payload.pn()) {