diff --git a/Extension/extension.cpp b/Extension/extension.cpp
index b049e70..5fc62eb 100644
--- a/Extension/extension.cpp
+++ b/Extension/extension.cpp
@@ -78,7 +78,7 @@ CSteamID SteamWorks::CreateCommonCSteamID(IGamePlayer *pPlayer, const cell_t *pa
 	EAccountType type = k_EAccountTypeIndividual;
 	
 	const char *pAuth = pPlayer->GetAuthString(false); /* We're not using this for Auth. */
-	if (pAuth == NULL || pAuth[0] == '\0' || strlen(pAuth) < 11 || pAuth[6] == 'I')
+	if (pAuth == NULL || pAuth[0] == '\0' || pAuth[0] == '[' || strlen(pAuth) < 11 || pAuth[6] == 'I')
 	{
 		return this->CreateCommonCSteamID(pPlayer->GetSteamAccountID(false), params, universeplace, typeplace);
 	}