diff --git a/src/ai/composite/aspect.hpp b/src/ai/composite/aspect.hpp
index 0e70be25d203..06ec08337d6e 100644
--- a/src/ai/composite/aspect.hpp
+++ b/src/ai/composite/aspect.hpp
@@ -28,7 +28,6 @@
 #include "../../log.hpp"
 
 #include <boost/bind.hpp>
-#include <boost/lexical_cast.hpp>
 #include <boost/pointer_cast.hpp>
 
 #ifdef _MSC_VER