diff --git a/Contrib/ExDLL/exdll.dpr b/Contrib/ExDLL/exdll.dpr
index ff1f613f..2fccf576 100644
--- a/Contrib/ExDLL/exdll.dpr
+++ b/Contrib/ExDLL/exdll.dpr
@@ -38,6 +38,7 @@ type
     INST_INSTDIR, // $INSTDIR
     INST_OUTDIR,  // $OUTDIR
     INST_EXEDIR,  // $EXEDIR
+    INST_LANG,    // $LANGUAGE
     __INST_LAST
     );
   TVariableList = INST_0..__INST_LAST;