diff --git a/c/masync_server/echo-server.c b/c/masync_server/echo-server.c
index 5f95355..7837ad7 100644
--- a/c/masync_server/echo-server.c
+++ b/c/masync_server/echo-server.c
@@ -9,6 +9,7 @@
 
 #include <pthread.h>
 #include <fcntl.h>
+#include <string.h>
 
 #include "xerror.h"
 #include "netfuncs.h"