--- a/pglogical_ticker.c
+++ b/pglogical_ticker.c
@@ -34,8 +34,8 @@ PG_MODULE_MAGIC;
 
 PG_FUNCTION_INFO_V1(pglogical_ticker_launch);
 
-void		_PG_init(void);
-void		pglogical_ticker_main(Datum) pg_attribute_noreturn();
+PGDLLEXPORT void		_PG_init(void);
+PGDLLEXPORT void		pglogical_ticker_main(Datum) pg_attribute_noreturn();
 
 /* flags set by signal handlers */
 static volatile sig_atomic_t got_sighup = false;
