1 files changed, 5 insertions, 3 deletions

diff --git a/src/lib_table.c b/src/lib_table.c
index 8ae54167..fab6b1f4 100644
--- a/src/lib_table.c
+++ b/src/lib_table.c
@@ -82,8 +82,10 @@ LJLIB_CF(table_maxn)
     }
   node = noderef(t->node);
   for (i = (ptrdiff_t)t->hmask; i >= 0; i--)
-    if (tvisnum(&node[i].key) && numV(&node[i].key) > m)
-      m = numV(&node[i].key);
+    if (tvisnumber(&node[i].key)) {
+      lua_Number n = numberVnum(&node[i].key);
+      if (n > m) m = n;
+    }
   setnumV(L->top-1, m);
   return 1;
 }
@@ -154,7 +156,7 @@ LJLIB_CF(table_concat)
       cTValue *o;
       lua_rawgeti(L, 1, i);
       o = L->top-1;
-      if (!(tvisstr(o) || tvisnum(o)))
+      if (!(tvisstr(o) || tvisnumber(o)))
         lj_err_callerv(L, LJ_ERR_TABCAT, typename(o), i);
       luaL_addvalue(&b);
       if (i++ == e) break;