-\protected\def\ltj@reset@globaldefs{%
- \directlua{luatexja.global_temp = tex.globaldefs; tex.globaldefs = 0}}
-\protected\def\ltj@restore@globaldefs{\directlua{tex.globaldefs = luatexja.global_temp}\relax}
-\protected\def\inhibitglue{\ifhmode\ltj@@ihb\fi}
-\def\ltj@@ihb{\relax\directlua{luatexja.jfmglue.create_inhibitglue_node()}}
+\newluafunction\ltj@reset@globaldefs@inner
+\newluafunction\ltj@restore@globaldefs@inner
+\newluafunction\ltj@@ihb@inner
+\newluafunction\ltj@@fakeparbegin@inner
+\newluafunction\ltj@@fakeboxbdd@inner
+\directlua{
+ local t = lua.get_functions_table()
+ t[\the\ltj@reset@globaldefs@inner]
+ = function() luatexja.global_temp = tex.globaldefs; tex.globaldefs = 0 end
+ t[\the\ltj@restore@globaldefs@inner]
+ = function() tex.globaldefs = luatexja.global_temp end
+ t[\the\ltj@@ihb@inner] = luatexja.jfmglue.create_inhibitglue_node
+ t[\the\ltj@@fakeparbegin@inner] = luatexja.jfmglue.create_beginpar_node
+ t[\the\ltj@@fakeboxbdd@inner] = luatexja.jfmglue.create_boxbdd_node
+}
+\protected\def\ltj@reset@globaldefs{\luafunction\ltj@reset@globaldefs@inner}
+\protected\def\ltj@restore@globaldefs{\luafunction\ltj@restore@globaldefs@inner}
+\protected\def\inhibitglue{\ifhmode\relax\luafunction\ltj@@ihb@inner\fi}
+\protected\def\ltjfakeparbegin{\ifhmode\relax\luafunction\ltj@@fakeparbegin@inner\fi}
+\protected\def\ltjfakeboxbdd{\ifhmode\relax\luafunction\ltj@@fakeboxbdd@inner\fi}
+