diff --git a/core/logic/smn_players.cpp b/core/logic/smn_players.cpp
index 7b27c0a1..ba42ecae 100644
--- a/core/logic/smn_players.cpp
+++ b/core/logic/smn_players.cpp
@@ -340,9 +340,8 @@ enum class AuthStringType
 	SteamID64,
 };
 
-static cell_t sm_GetClientAuthStr(IPluginContext *pCtx, const cell_t *params)
+static cell_t SteamIDToLocal(IPluginContext *pCtx, int index, AuthStringType authType, cell_t local_addr, size_t bytes, bool validate)
 {
-	int index = params[1];
 	if ((index < 1) || (index > playerhelpers->GetMaxClients()))
 	{
 		return pCtx->ThrowNativeError("Client index %d is invalid", index);
@@ -354,18 +353,6 @@ static cell_t sm_GetClientAuthStr(IPluginContext *pCtx, const cell_t *params)
 		return pCtx->ThrowNativeError("Client %d is not connected", index);
 	}
 
-	bool validate = true;
-	if (params[0] >= 4)
-	{
-		validate = !!params[4];
-	}
-	
-	AuthStringType authType = AuthStringType::Engine;
-	if (params[0] >= 5)
-	{
-		authType = (AuthStringType)params[5];
-	}
-
 	switch (authType)
 	{
 	case AuthStringType::Engine:
@@ -376,7 +363,7 @@ static cell_t sm_GetClientAuthStr(IPluginContext *pCtx, const cell_t *params)
 				return 0;
 			}
 
-			pCtx->StringToLocal(params[2], static_cast<size_t>(params[3]), authstr);
+			pCtx->StringToLocal(local_addr, bytes, authstr);
 		}
 		break;
 	case AuthStringType::Steam2:
@@ -384,7 +371,7 @@ static cell_t sm_GetClientAuthStr(IPluginContext *pCtx, const cell_t *params)
 		{
 			if (pPlayer->IsFakeClient())
 			{
-				pCtx->StringToLocal(params[2], static_cast<size_t>(params[3]), "BOT");
+				pCtx->StringToLocal(local_addr, bytes, "BOT");
 				return 1;
 			}
 			
@@ -393,11 +380,11 @@ static cell_t sm_GetClientAuthStr(IPluginContext *pCtx, const cell_t *params)
 			{
 				if (gamehelpers->IsLANServer())
 				{
-					pCtx->StringToLocal(params[2], static_cast<size_t>(params[3]), "STEAM_ID_LAN");
+					pCtx->StringToLocal(local_addr, bytes, "STEAM_ID_LAN");
 				}
 				else
 				{				
-					pCtx->StringToLocal(params[2], static_cast<size_t>(params[3]), "STEAM_ID_PENDING");
+					pCtx->StringToLocal(local_addr, bytes, "STEAM_ID_PENDING");
 				}
 				
 				return 1;
@@ -425,7 +412,7 @@ static cell_t sm_GetClientAuthStr(IPluginContext *pCtx, const cell_t *params)
 				snprintf(szAuth, sizeof(szAuth), "[U:%u:%u]", universe, accountId);
 			}
 			
-			pCtx->StringToLocal(params[2], static_cast<size_t>(params[3]), szAuth);
+			pCtx->StringToLocal(local_addr, bytes, szAuth);
 		}
 		break;
 	
@@ -445,7 +432,7 @@ static cell_t sm_GetClientAuthStr(IPluginContext *pCtx, const cell_t *params)
 			char szAuth[64];
 			snprintf(szAuth, sizeof(szAuth), "%" PRIu64, steamId);
 			
-			pCtx->StringToLocal(params[2], static_cast<size_t>(params[3]), szAuth);
+			pCtx->StringToLocal(local_addr, bytes, szAuth);
 		}
 		break;
 	}	
@@ -453,6 +440,22 @@ static cell_t sm_GetClientAuthStr(IPluginContext *pCtx, const cell_t *params)
 	return 1;
 }
 
+static cell_t sm_GetClientAuthStr(IPluginContext *pCtx, const cell_t *params)
+{
+	bool validate = true;
+	if (params[0] >= 4)
+	{
+		validate = !!params[4];
+	}
+	
+	return SteamIDToLocal(pCtx, params[1], AuthStringType::Steam2, params[2], (size_t)params[3], validate);
+}
+
+static cell_t sm_GetClientAuthStr2(IPluginContext *pCtx, const cell_t *params)
+{
+	return SteamIDToLocal(pCtx, params[1], (AuthStringType)params[2], params[3], (size_t)params[4], params[5] != 0);
+}
+
 static cell_t sm_GetSteamAccountID(IPluginContext *pCtx, const cell_t *params)
 {
 	int index = params[1];
@@ -1639,6 +1642,7 @@ REGISTER_NATIVES(playernatives)
 	{ "CanUserTarget", CanUserTarget },
 	{ "ChangeClientTeam", ChangeClientTeam },
 	{ "GetClientAuthString", sm_GetClientAuthStr },
+	{ "GetClientAuthString2", sm_GetClientAuthStr2 },
 	{ "GetSteamAccountID", sm_GetSteamAccountID },
 	{ "GetClientCount", sm_GetClientCount },
 	{ "GetClientInfo", sm_GetClientInfo },
diff --git a/plugins/include/clients.inc b/plugins/include/clients.inc
index 913d26a3..ef4aa7fa 100644
--- a/plugins/include/clients.inc
+++ b/plugins/include/clients.inc
@@ -277,11 +277,26 @@ native bool:GetClientIP(client, String:ip[], maxlen, bool:remport=true);
  * @param validate		Check backend validation status.
  * 				DO NOT PASS FALSE UNLESS YOU UNDERSTAND THE CONSEQUENCES,
  *			        You WILL KNOW if you need to use this, MOST WILL NOT.
- * @param authType		Auth string type and format to use.
  * @return				True on success, false otherwise.
  * @error				If the client is not connected or the index is invalid.
  */
-native bool:GetClientAuthString(client, String:auth[], maxlen, bool:validate=true, AuthStringType:authType=AuthString_Engine);
+#pragma deprecated Use GetClientAuthString2
+native bool:GetClientAuthString(client, String:auth[], maxlen, bool:validate=true);
+
+/**
+ * Retrieves a client's authentication string (SteamID).
+ *
+ * @param client		Player index.
+ * @param authType		Auth string type and format to use.
+ * @param auth			Buffer to store the client's auth string.
+ * @param maxlen		Maximum length of string buffer (includes NULL terminator).
+ * @param validate		Check backend validation status.
+ * 				DO NOT PASS FALSE UNLESS YOU UNDERSTAND THE CONSEQUENCES,
+ *			        You WILL KNOW if you need to use this, MOST WILL NOT.
+ * @return				True on success, false otherwise.
+ * @error				If the client is not connected or the index is invalid.
+ */
+native bool:GetClientAuthString2(client, AuthStringType:authType, String:auth[], maxlen, bool:validate=true);
 
 /**
  * Returns the client's Steam account ID.