diff --git a/src/calibre/gui2/preferences/plugins.py b/src/calibre/gui2/preferences/plugins.py
index 8f206f68f4..897de11d79 100644
--- a/src/calibre/gui2/preferences/plugins.py
+++ b/src/calibre/gui2/preferences/plugins.py
@@ -377,7 +377,8 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
                     'confirm_plugin_removal_msg', parent=self):
                     return
 
-                msg = _('Plugin <b>{0}</b> successfully removed').format(plugin.name)
+                msg = _('Plugin <b>{0}</b> successfully removed. You will have'
+                        ' to restart calibre for it to be completely removed.').format(plugin.name)
                 if remove_plugin(plugin):
                     self._plugin_model.beginResetModel()
                     self._plugin_model.populate()