diff --git a/luprex/eris-master/build.bat b/luprex/eris-master/build.bat
index eb2c95d7..6f49b25f 100644
--- a/luprex/eris-master/build.bat
+++ b/luprex/eris-master/build.bat
@@ -10,5 +10,6 @@ cp lua.h ../../core/inc/
 cp luaconf.h ../../core/inc/
 cp lauxlib.h ../../core/inc/
 cp lualib.h ../../core/inc/
+cp eris.h ../../core/inc/
 
 cd ..