diff --git a/rules.d/core-rules.sh b/rules.d/core-rules.sh
index 3b2f8098..0d3b9dd3 100644
--- a/rules.d/core-rules.sh
+++ b/rules.d/core-rules.sh
@@ -394,6 +394,11 @@ libretro_gw_git_url="https://github.com/libretro/gw-libretro.git"
 libretro_gw_git_submodules="yes"
 libretro_gw_build_makefile="Makefile.libretro"
 
+register_module core "81" -theos_ios -ngc -sncps3 -ps3 -psp1 -qnx -wii
+libretro_81_name="81"
+libretro_81_git_url="https://github.com/libretro/81-libretro.git"
+libretro_81_build_makefile="Makefile.libretro"
+
 register_module core "lutro" -theos_ios -ngc -ps3 -psp1 -qnx -wii
 libretro_lutro_name="Lutro"
 libretro_lutro_git_url="https://github.com/libretro/libretro-lutro.git"