diff --git a/kiwmi/luak/kiwmi_keyboard.c b/kiwmi/luak/kiwmi_keyboard.c
index 44a226b..3158d7f 100644
--- a/kiwmi/luak/kiwmi_keyboard.c
+++ b/kiwmi/luak/kiwmi_keyboard.c
@@ -78,9 +78,11 @@ kiwmi_keyboard_on_key_down_or_up_notify(
     for (int i = 0; i < nsyms; ++i) {
         xkb_keysym_t sym = syms[i];
 
-        int namelen =
+        size_t namelen =
             xkb_keysym_get_name(sym, keysym_name, sizeof(keysym_name));
 
+        namelen = namelen > sizeof(keysym_name) ? sizeof(keysym_name) : namelen;
+
         lua_rawgeti(L, LUA_REGISTRYINDEX, lc->callback_ref);
 
         lua_newtable(L);