diff --git a/tests/bandwidth-server-many-up.c b/tests/bandwidth-server-many-up.c
index 32d9705..1b55918 100644
--- a/tests/bandwidth-server-many-up.c
+++ b/tests/bandwidth-server-many-up.c
@@ -27,6 +27,7 @@
 #if defined(_WIN32)
 #include <ws2tcpip.h>
 #else
+#include <sys/select.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>