diff --git a/NetworkLock.cpp b/NetworkLock.cpp
index a852ea6..03f3514 100644
--- a/NetworkLock.cpp
+++ b/NetworkLock.cpp
@@ -13,6 +13,8 @@ NetworkLock::NetworkLock(Network* network, Preferences* preferences, char* buffe
   _buffer(buffer),
   _bufferSize(bufferSize)
 {
+
+    memset(authName, 0, sizeof(authName));
     _network->registerMqttReceiver(this);
 }
 
diff --git a/NetworkOpener.cpp b/NetworkOpener.cpp
index 86fe33c..41b2642 100644
--- a/NetworkOpener.cpp
+++ b/NetworkOpener.cpp
@@ -12,6 +12,8 @@ NetworkOpener::NetworkOpener(Network* network, Preferences* preferences, char* b
           _buffer(buffer),
           _bufferSize(bufferSize)
 {
+
+    memset(authName, 0, sizeof(authName));
     _network->registerMqttReceiver(this);
 }