diff -bu a/source/libs/luajit/LuaJIT-src/src/lib_package.c  b/source/libs/luajit/LuaJIT-src/src/lib_package.c 
--- a/source/libs/luajit/LuaJIT-src/src/lib_package.c
+++ b/source/libs/luajit/LuaJIT-src/src/lib_package.c
@@ -378,6 +378,29 @@
   return 1;  /* library loaded successfully */
 }
 
+#define LUA_POF         "luaopen_"
+#define LUA_OFSEP       "_"
+#define POF             LUA_POF
+
+static const char *mkfuncname (lua_State *L, const char *modname) {
+  const char *funcname;
+  const char *mark = strchr(modname, *LUA_IGMARK);
+  if (mark) modname = mark + 1;
+  funcname = luaL_gsub(L, modname, ".", LUA_OFSEP);
+  funcname = lua_pushfstring(L, POF"%s", funcname);
+  lua_remove(L, -2);  /* remove 'gsub' result */
+  return funcname;
+}
+
+int loader_C_luatex (lua_State *L, const char *name, const char *filename) {
+  const char *funcname;
+  funcname = mkfuncname(L, name);
+  if (ll_loadfunc(L, filename, funcname,0) != 0)
+    loaderror(L, filename);
+  return 1;  /* library loaded successfully */
+}
+
+
 static int lj_cf_package_loader_c(lua_State *L)
 {
   const char *name = luaL_checkstring(L, 1);
@@ -407,6 +430,20 @@
   return 1;
 }
 
+int loader_Call_luatex (lua_State *L, const char *name, const char *filename) {
+  const char *funcname;
+  int stat;
+  if (filename == NULL) return 1;  /* root not found */
+  funcname = mkfuncname(L, name);
+  if ((stat = ll_loadfunc(L, filename, funcname,0)) != 0) {
+    if (stat != PACKAGE_ERR_FUNC) loaderror(L, filename);  /* real error */
+    lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS,
+                       name, filename);
+    return 1;  /* function not found */
+  }
+  return 1;  /* library loaded successfully */
+}
+
 static int lj_cf_package_loader_preload(lua_State *L)
 {
   const char *name = luaL_checkstring(L, 1);
