diff --git a/WiFiManager.cpp b/WiFiManager.cpp
index b94e0fc..3d97c04 100644
--- a/WiFiManager.cpp
+++ b/WiFiManager.cpp
@@ -686,7 +686,7 @@ void WiFiManager::handleWifiSave() {
     //read parameter
     String value = server->arg(_params[i]->getID()).c_str();
     //store it in array
-    value.toCharArray(_params[i]->_value, _params[i]->_length);
+    value.toCharArray(_params[i]->_value, _params[i]->_length+1); // length+1 null terminated
     DEBUG_WM(F("Parameter"));
     DEBUG_WM(_params[i]->getID());
     DEBUG_WM(value);