diff --git a/programs/test/udp_proxy.c b/programs/test/udp_proxy.c
index a8cb3c6..778b604 100644
--- a/programs/test/udp_proxy.c
+++ b/programs/test/udp_proxy.c
@@ -47,6 +47,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <time.h>
 
 /* For select() */