diff --git a/luprex/eris-master/build.bat b/luprex/eris-master/build.bat
index 239bd821..d73bf713 100644
--- a/luprex/eris-master/build.bat
+++ b/luprex/eris-master/build.bat
@@ -8,5 +8,6 @@ cp liblua.a ../../core/lib/liblua-opt.a
 
 cp lua.h ../../core/inc/
 cp luaconf.h ../../core/inc/
+cp lauxlib.h ../../core/inc/
 
 cd ..