diff --git a/src/network/core/core.h b/src/network/core/core.h
index 10df20af72..083ec02b25 100644
--- a/src/network/core/core.h
+++ b/src/network/core/core.h
@@ -15,6 +15,7 @@
 #define NETWORK_CORE_H
 
 #include "../../newgrf_config.h"
+#include "config.h"
 
 #ifdef ENABLE_NETWORK