diff --git a/Mk/Uses/luajit.mk b/Mk/Uses/luajit.mk
index c2be165d1353..452370b55de6 100644
--- a/Mk/Uses/luajit.mk
+++ b/Mk/Uses/luajit.mk
@@ -1,27 +1,37 @@
 # Select your favorite luajit runtime
 # Feature:    luajit
 # Usage:      USES=  luajit[:version]
 # MAINTAINER: adamw@FreeBSD.org
 
+# After bsd.port.options.mk or bsd.port.pre.mk, the following are set:
+#   LUAJIT_VER:    The selected luajit version
+#   LUAJIT_INCDIR: The path to luajit's header files
+
 .if !defined(_INCLUDE_USES_LUAJIT_MK)
 _INCLUDE_USES_LUAJIT_MK=yes
 
 .if !empty(luajit_ARGS)
 LUAJIT_VER=	${luajit_ARGS}
 .else
 LUAJIT_VER=	${LUAJIT_DEFAULT}
 .endif
 
 # When adding a version, please keep the comment in
 # Mk/bsd.default-versions.mk in sync
 VALID_LUAJIT_VER=	luajit luajit-devel luajit-openresty
 
 .if empty(VALID_LUAJIT_VER:M${LUAJIT_DEFAULT})
 IGNORE=	Invalid luajit default version ${LUAJIT_DEFAULT}: valid versions are ${VALID_LUAJIT_VER}
 .elif empty(VALID_LUAJIT_VER:M${LUAJIT_VER})
 IGNORE=	Invalid luajit version ${LUAJIT_VER}: valid versions are ${VALID_LUAJIT_VER}
 .endif
 
+.if ${LUAJIT_VER} == luajit
+LUAJIT_INCDIR=	${LOCALBASE}/include/luajit-2.0
+.else
+LUAJIT_INCDIR=	${LOCALBASE}/include/luajit-2.1
+.endif
+
 LIB_DEPENDS+=	libluajit-5.1.so:lang/${LUAJIT_VER}
 
 .endif