diff --git a/src/bin/scripts/vacuumdb.c b/src/bin/scripts/vacuumdb.c
index c10b58b..32cb0fc 100644
--- a/src/bin/scripts/vacuumdb.c
+++ b/src/bin/scripts/vacuumdb.c
@@ -12,6 +12,10 @@
 
 #include "postgres_fe.h"
 
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
 #include "common.h"
 #include "fe_utils/simple_list.h"
 #include "fe_utils/string_utils.h"