diff --git a/src/beast/beast/net/Net.cpp b/src/beast/beast/net/Net.cpp
index d968f28132..e8b3cc9235 100644
--- a/src/beast/beast/net/Net.cpp
+++ b/src/beast/beast/net/Net.cpp
@@ -17,6 +17,8 @@
 */
 //==============================================================================
 
+#include "BeastConfig.h"
+
 #include "../../modules/beast_core/beast_core.h"
 
 #include "impl/IPEndpoint.cpp"