diff --git a/library/ContextShared.cpp b/library/ContextShared.cpp
index c25fecc90..7798cc85f 100644
--- a/library/ContextShared.cpp
+++ b/library/ContextShared.cpp
@@ -17,6 +17,7 @@
 #include "dfhack/modules/World.h"
 #include "dfhack/modules/Buildings.h"
 #include "dfhack/modules/Constructions.h"
+#include "dfhack/modules/WindowIO.h"
 
 using namespace DFHack;