diff --git a/storage/innobase/include/srv0srv.h b/storage/innobase/include/srv0srv.h
index d50e582..d1874b1 100644
--- a/storage/innobase/include/srv0srv.h
+++ b/storage/innobase/include/srv0srv.h
@@ -511,6 +511,9 @@ std::chrono::microseconds get_srv_log_wait_for_flush_timeout();
 for new data to write or flush without sleeping. */
 extern ulong srv_log_writer_spin_delay;
 
+/** Initial timeout used to wait on writer_event. */
+extern ulong srv_log_writer_timeout;
+
 /** Initial timeout used to wait on writer_event. */
 std::chrono::microseconds get_srv_log_writer_timeout();