diff --git a/include/automatable_model_templates.h b/include/automatable_model_templates.h
index e8b9769ae..1bf06a31a 100644
--- a/include/automatable_model_templates.h
+++ b/include/automatable_model_templates.h
@@ -161,6 +161,10 @@ void automatableModel<T, EDIT_STEP_TYPE>::setValue( const T _value )
 		setFirstValue();
 		emit dataChanged();
 	}
+	else
+	{
+		emit dataUnchanged();
+	}
 }
 
 
diff --git a/include/mv_base.h b/include/mv_base.h
index dab64b2c0..281b3fef3 100644
--- a/include/mv_base.h
+++ b/include/mv_base.h
@@ -57,6 +57,9 @@ signals:
 	// emitted if actual data of the model (e.g. values) have changed
 	void dataChanged( void );
 
+	// emitted in case new data was not set as it's been equal to old data
+	void dataUnchanged( void );
+
 	// emitted if properties of the model (e.g. ranges) have changed
 	void propertiesChanged( void );