diff -up OS-2.9.3/src/OSParsers/OSParseosil.l.orig OS-2.9.3/src/OSParsers/OSParseosil.l
--- OS-2.9.3/src/OSParsers/OSParseosil.l.orig	2015-06-14 11:23:40.915242195 -0300
+++ OS-2.9.3/src/OSParsers/OSParseosil.l	2015-06-14 11:24:04.440243096 -0300
@@ -36,7 +36,10 @@
 #include "OSDataStructures.h"
 #include "OSErrorClass.h"
 #include "OSMathUtil.h"
+#include "OSgLParserData.h"
 #include "OSiLParserData.h"
+#include "OSnLParserData.h"
+#include "OSInstance.h"
 #include "OSParseosil.tab.hpp"
 #include "OSInstance.h"
 #include "OSGeneral.h"