1 files changed, 3 insertions, 1 deletions

diff --git a/lvm.h b/lvm.h
index b69c5411..a58e8315 100644
--- a/lvm.h
+++ b/lvm.h
@@ -13,7 +13,9 @@
 #include "ltm.h"
 
 
-#define tostring(L,o) ((ttype(o) != LUA_TSTRING) && (luaV_tostring(L, o) != 0))
+#define tostring(L,o) ((ttype(o) == LUA_TSTRING) || (luaV_tostring(L, o)))
+
+#define tonumber(o,n)   (((o) = luaV_tonumber(o,n)) != NULL)
 
 
 const TObject *luaV_tonumber (const TObject *obj, TObject *n);