diff --git a/src/MFAServer.cpp b/src/MFAServer.cpp
index d4faad1..acb04d6 100644
--- a/src/MFAServer.cpp
+++ b/src/MFAServer.cpp
@@ -78,8 +78,9 @@ namespace OpenWifi {
         }
 
         auto answer = ChallengeResponse->get("answer").toString();
+        std::string Expecting;
         if(Hint->second.Method==MFAMETHODS::AUTHENTICATOR &&
-            !TotpCache()->ValidateCode(Hint->second.UInfo.userinfo.userTypeProprietaryInfo.authenticatorSecret,answer)) {
+            !TotpCache()->ValidateCode(Hint->second.UInfo.userinfo.userTypeProprietaryInfo.authenticatorSecret,answer, Expecting)) {
             return false;
         } else if(Hint->second.Answer!=answer) {
             return false;