diff --git a/LuaFunctions.cpp b/LuaFunctions.cpp
index 7943596..a889023 100644
--- a/LuaFunctions.cpp
+++ b/LuaFunctions.cpp
@@ -702,7 +702,7 @@ ElunaRegister<Player> PlayerMethods[] =
     { "SendTaxiMenu", &LuaPlayer::SendTaxiMenu },                                         // :SendTaxiMenu(creature) - Sends flight window to player from creature
     { "RewardQuest", &LuaPlayer::RewardQuest },                                           // :RewardQuest(entry) - Gives quest rewards for the player
     { "SendAuctionMenu", &LuaPlayer::SendAuctionMenu },                                   // :SendAuctionMenu(unit) - Sends auction window to player. Auction house is sent by object.
-    { "SendShowMailBox", &LuaPlayer::SendShowMailBox },                                   // :SendShowMailBox([guid]) - Sends mail window to player. Sent by guid if provided (valid mailbox required for < wotlk)
+    { "SendShowMailBox", &LuaPlayer::SendShowMailBox },                                   // :SendShowMailBox([mailboxguid]) - Sends the mail window to player from the mailbox gameobject. The guid is required on patches below wotlk.
     { "StartTaxi", &LuaPlayer::StartTaxi },                                               // :StartTaxi(pathId) - player starts the given flight path
     { "GossipSendPOI", &LuaPlayer::GossipSendPOI },                                       // :GossipSendPOI(X, Y, Icon, Flags, Data, Name) - Sends a point of interest to the player
     { "GossipAddQuests", &LuaPlayer::GossipAddQuests },                                   // :GossipAddQuests(unit) - Adds unit's quests to player's gossip menu
diff --git a/PlayerMethods.h b/PlayerMethods.h
index c091aaa..12943cd 100644
--- a/PlayerMethods.h
+++ b/PlayerMethods.h
@@ -1567,7 +1567,7 @@ namespace LuaPlayer
     int DurabilityRepairAll(Eluna* /*E*/, lua_State* L, Player* player)
     {
         bool cost = Eluna::CHECKVAL<bool>(L, 2, true);
-        float discountMod = Eluna::CHECKVAL<float>(L, 3);
+        float discountMod = Eluna::CHECKVAL<float>(L, 3, 1.0f);
         bool guildBank = Eluna::CHECKVAL<bool>(L, 4, false);
 
 #ifdef CLASSIC