diff --git a/lapi.c b/lapi.c
index ffc4d5e..8b48f7f 100644
--- a/lapi.c
+++ b/lapi.c
@@ -230,7 +230,7 @@
   lua_lock(L);
   fr = index2value(L, fromidx);
   to = index2value(L, toidx);
-  api_check(l, isvalid(L, to), "invalid index");
+  api_check(L, isvalid(L, to), "invalid index");
   setobj(L, to, fr);
   if (isupvalue(toidx))  /* function upvalue? */
     luaC_barrier(L, clCvalue(s2v(L->ci->func)), fr);
diff --git a/llimits.h b/llimits.h
index 2b52c83..b86d345 100644
--- a/llimits.h
+++ b/llimits.h
@@ -99,7 +99,7 @@
 ** assertion for checking API calls
 */
 #if !defined(luai_apicheck)
-#define luai_apicheck(l,e)	lua_assert(e)
+#define luai_apicheck(l,e)	((void)l, lua_assert(e))
 #endif
 
 #define api_check(l,e,msg)	luai_apicheck(l,(e) && msg)