--- src/lua.c.orig	2026-08-07 07:59:17 UTC
+++ src/lua.c
@@ -513,18 +513,29 @@ static void lua_initreadline (lua_State *L) {
 #include <dlfcn.h>
 
 static void lua_initreadline (lua_State *L) {
+  union {
+    void *ptr;
+    l_readlineT rlfunc;
+    l_addhistT ahfunc;
+    char **rlnamevar;
+    int *icompvar;
+  } u;
+
   const char *rllib = l_getenv(LUA_RLLIB_VAR);  /* name of readline library */
   void *lib;  /* library handle */
   if (rllib == NULL)  /* no environment variable? */
     rllib = LUA_READLINELIB;  /* use default name */
   lib = dlopen(rllib, RTLD_NOW | RTLD_LOCAL);
   if (lib != NULL) {
-    const char **name = cast(const char**, dlsym(lib, "rl_readline_name"));
-    if (name != NULL)
-      *name = "lua";
-    l_readline = cast(l_readlineT, cast_func(dlsym(lib, "readline")));
-    l_addhist = cast(l_addhistT, cast_func(dlsym(lib, "add_history")));
-    if (l_readline != NULL)  /* could load readline function? */
+    u.ptr = dlsym(lib, "readline");
+    l_readline = u.rlfunc;
+    u.ptr = dlsym(lib, "add_history");
+    l_addhist = u.ahfunc;
+    if ((u.ptr = dlsym(lib, "rl_readline_name")))
+      *u.rlnamevar = "lua";
+    if ((u.ptr = dlsym(lib, "rl_inhibit_completion")))
+      *u.icompvar = 1;
+    if (l_readline != NULL)
       return;  /* everything ok */
     /* else emit a warning */
   }
@@ -791,4 +802,3 @@ int main (int argc, char **argv) {
   lua_close(L);
   return (result && status == LUA_OK) ? EXIT_SUCCESS : EXIT_FAILURE;
 }
-