diff --git a/code/include/swoc/swoc_ip.h b/code/include/swoc/swoc_ip.h
index ab45b13..4debb18 100644
--- a/code/include/swoc/swoc_ip.h
+++ b/code/include/swoc/swoc_ip.h
@@ -6,6 +6,7 @@
  */
 
 #pragma once
+#include <array>
 #include <climits>
 #include <netinet/in.h>
 #include <string_view>