diff --git a/src/SocketCore.cc b/src/SocketCore.cc
index 49a6dc99..8358527e 100644
--- a/src/SocketCore.cc
+++ b/src/SocketCore.cc
@@ -47,6 +47,7 @@
 #include <cstring>
 #include <cassert>
 #include <sstream>
+#include <array>
 
 #include "message.h"
 #include "DlRetryEx.h"