diff --git a/src/KProperty.cpp b/src/KProperty.cpp
--- a/src/KProperty.cpp
+++ b/src/KProperty.cpp
@@ -101,7 +101,7 @@
     bool valueDiffersInternal(const QVariant &otherValue, KProperty::ValueOptions options)
     {
         if (!compatibleTypes(value, otherValue)) {
-            kprWarning() << "INCOMPATIBLE TYPES! old=" << value << "new=" << otherValue;
+            kprWarning() << "INCOMPATIBLE TYPES! old=" << value << "new=" << otherValue << "in property" << q->name();
         }
 
         const QVariant::Type t = value.type();