diff --git a/src/TLSClient.cpp b/src/TLSClient.cpp
index 346489c4e..c130d0cf6 100644
--- a/src/TLSClient.cpp
+++ b/src/TLSClient.cpp
@@ -32,6 +32,7 @@
 #include <iostream>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <TLSClient.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>