diff --git a/linphone-app/src/components/core/CoreHandlers.cpp b/linphone-app/src/components/core/CoreHandlers.cpp
index b419ae38f..bcd3a2912 100644
--- a/linphone-app/src/components/core/CoreHandlers.cpp
+++ b/linphone-app/src/components/core/CoreHandlers.cpp
@@ -60,10 +60,14 @@ void CoreHandlers::onAuthenticationRequested (
 		auto config = configList.begin() ;
 		std::string username = authInfo->getUsername();
 		std::string domain = authInfo->getDomain();
-		while(config != configList.end() && ((*config)->getContact()->getUsername() != username || (*config)->getContact()->getDomain() != domain))
-			++config;
-		if( config != configList.end() )
-			emit authenticationRequested(authInfo);// Send authentification request only if a proxy still exists
+		while(config != configList.end()) {
+			auto contact = (*config)->getContact();
+			if( contact && contact->getUsername() == username && (*config)->getContact()->getDomain() == domain) {
+				emit authenticationRequested(authInfo);// Send authentification request only if a proxy still exists
+				return;
+			}else
+				++config;
+		}
 	}
 }