diff --git a/luprex/eris-master/build.bat b/luprex/eris-master/build.bat
index d73bf713..c894578e 100644
--- a/luprex/eris-master/build.bat
+++ b/luprex/eris-master/build.bat
@@ -9,5 +9,6 @@ cp liblua.a ../../core/lib/liblua-opt.a
 cp lua.h ../../core/inc/
 cp luaconf.h ../../core/inc/
 cp lauxlib.h ../../core/inc/
+cp lualib.h ../../core/inc/
 
 cd ..