diff --git a/sslSniffer/sslSnifferTest/snifftest.c b/sslSniffer/sslSnifferTest/snifftest.c
index 21433b931..c1731bfbc 100755
--- a/sslSniffer/sslSnifferTest/snifftest.c
+++ b/sslSniffer/sslSnifferTest/snifftest.c
@@ -53,6 +53,7 @@ int main(void)
 #include <stdlib.h>        /* EXIT_SUCCESS */
 #include <string.h>        /* strcmp */
 #include <signal.h>        /* signal */
+#include <sys/socket.h>    /* AF_INET */
 
 #include <cyassl/sniffer.h>