diff --git a/configuration.cc b/configuration.cc
index ee2488c..afc6e10 100644
--- a/configuration.cc
+++ b/configuration.cc
@@ -134,6 +134,7 @@ void Configuration::SaveConfig(std::string filename) {
 
 	//
 	// save windows position
+	printf ("%s:%d Xwayland is not able to retrieve the current position.\n", __FILE__, __LINE__);
 	for (i = 0; i < 6; i++) {
 		int x, y, w, h, show;
 		string name;