--- src/lua.c.orig	2025-12-15 10:44:40 UTC
+++ src/lua.c
@@ -498,18 +498,30 @@ 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;
+
   void *lib = dlopen(LUA_READLINELIB, RTLD_NOW | RTLD_LOCAL);
-  if (lib == NULL)
+  if (lib == NULL) {
     lua_warning(L, "library '" LUA_READLINELIB "' not found", 0);
-  else {
-    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)
-      lua_warning(L, "unable to load 'readline'", 0);
+    return;
   }
+
+  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)
+    lua_warning(L, "unable to load 'readline' from dynamic library", 0);
 }
 
 #else		/* }{ */