diff --git a/pgxn/neon/communicator/src/worker_process/callbacks.rs b/pgxn/neon/communicator/src/worker_process/callbacks.rs
index ca33abf70a..d72afe1ea7 100644
--- a/pgxn/neon/communicator/src/worker_process/callbacks.rs
+++ b/pgxn/neon/communicator/src/worker_process/callbacks.rs
@@ -27,7 +27,7 @@ unsafe fn callback_set_my_latch_unsafe() {
     panic!("not usable in unit tests");
 }
 #[cfg(test)]
-unsafe fn callback_get_request_lsn_unsafe() -> Lsn {
+unsafe fn callback_get_request_lsn_unsafe() -> crate::neon_request::CLsn {
     panic!("not usable in unit tests");
 }
 #[cfg(test)]