diff -up OS-2.10.1/src/OSParsers/OSParseosil.l.orig OS-2.10.1/src/OSParsers/OSParseosil.l
--- OS-2.10.1/src/OSParsers/OSParseosil.l.orig	2016-03-17 12:46:13.672925423 -0300
+++ OS-2.10.1/src/OSParsers/OSParseosil.l	2016-03-17 12:46:23.557925801 -0300
@@ -35,7 +35,10 @@
 #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"
diff -up OS-2.10.1/src/OSParsers/OSParseosrl.l.orig OS-2.10.1/src/OSParsers/OSParseosrl.l
--- OS-2.10.1/src/OSParsers/OSParseosrl.l.orig	2016-03-17 12:46:21.239925712 -0300
+++ OS-2.10.1/src/OSParsers/OSParseosrl.l	2016-03-17 12:46:58.584927142 -0300
@@ -35,10 +35,13 @@
 #include "OSDataStructures.h"
 #include "OSErrorClass.h"
 #include "OSMathUtil.h"
+#include "OSgLParserData.h"
 #include "OSrLParserData.h"
-#include "OSParseosrl.tab.hpp"
+#include "OSnLParserData.h"
+#include "OSInstance.h"
 #include "OSResult.h"
 #include "OSGeneral.h"
+#include "OSParseosrl.tab.hpp"
 
 #ifdef HAVE_CSTDIO
 # include <cstdio>