diff --git a/db/timeout_clock.hh b/db/timeout_clock.hh
index fbf5195bba..4759d1545c 100644
--- a/db/timeout_clock.hh
+++ b/db/timeout_clock.hh
@@ -27,6 +27,6 @@
 
 namespace db {
 using timeout_clock = seastar::lowres_clock;
-using timeout_semaphore = basic_semaphore<default_timeout_exception_factory, timeout_clock>;
+using timeout_semaphore = seastar::basic_semaphore<seastar::default_timeout_exception_factory, timeout_clock>;
 static constexpr timeout_clock::time_point no_timeout = timeout_clock::time_point::max();
 }