diff --git a/src/knx/group_object.cpp b/src/knx/group_object.cpp
index fdc2926..2ed11d9 100644
--- a/src/knx/group_object.cpp
+++ b/src/knx/group_object.cpp
@@ -195,7 +195,7 @@ void GroupObject::value(const KNXValue& value, const Dpt& type)
 
 KNXValue GroupObject::value(const Dpt& type)
 {
-    KNXValue value = 0;
+    KNXValue value = "";
     KNX_Decode_Value(_data, _dataLength, type, value);
     return value;
 }