diff --git a/sample/time-test.c b/sample/time-test.c
index 4c87d778..82612b69 100644
--- a/sample/time-test.c
+++ b/sample/time-test.c
@@ -27,6 +27,9 @@
 #include <event.h>
 #include <evutil.h>
 
+#ifdef WIN32
+#include <winsock2.h>
+#endif
 #ifdef _EVENT___func__
 #define __func__ _EVENT___func__
 #endif