diff --git a/library.json b/library.json
index 73d2f45..04fd2d0 100644
--- a/library.json
+++ b/library.json
@@ -1,7 +1,7 @@
 {
   "$schema": "https://raw.githubusercontent.com/platformio/platformio-core/develop/platformio/assets/schema/library.json",
   "name": "ha-mqtt",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "Home Assistant classes for integration with MQTT auto discovery",
   "repository": {
     "type": "git",
diff --git a/src/ha.h b/src/ha.h
index 8465741..7103b45 100644
--- a/src/ha.h
+++ b/src/ha.h
@@ -363,7 +363,7 @@ namespace Ha {
 
         Sensor(const char* name, const char* id) : Component(name, id, "sensor"), StateConfig(this) {
             withStateTopic();
-            mapSensors.insert({ id, this });
+            mapSensors.insert({ string(id), this });
         }
 
     protected: