diff --git a/source/libublsettings-gtk3-window-config.c b/source/libublsettings-gtk3-window-config.c
index ad2c611..536276e 100644
--- a/source/libublsettings-gtk3-window-config.c
+++ b/source/libublsettings-gtk3-window-config.c
@@ -181,8 +181,8 @@
                 }
                 g_object_set_property(G_OBJECT(param->track_widget),param->property_name,val);
             }
-            if (__yon_main_window_config.width==0) __yon_main_window_config.width=800;
-            if (__yon_main_window_config.height==0) __yon_main_window_config.height=300;
+            if (__yon_main_window_config.width==0) gtk_window_get_size(GTK_WINDOW(__yon_window_config_target_window),&__yon_main_window_config.width,NULL);
+            if (__yon_main_window_config.height==0) gtk_window_get_size(GTK_WINDOW(__yon_window_config_target_window),NULL,&__yon_main_window_config.height);
             gtk_window_resize(__yon_window_config_target_window,__yon_main_window_config.width,__yon_main_window_config.height);
             gtk_window_move(__yon_window_config_target_window,__yon_main_window_config.x,__yon_main_window_config.y);
             pthread_t tid;
@@ -279,6 +279,8 @@
                     if (err) return 0; else return 1;
                 break;
             }
+        } else {
+            g_error("Window configuration were not set");
         }
         return 0;
     }