--- a/PluginManager/PluginManager.py	Mon Dec 28 12:07:59 2015 +0100
+++ b/PluginManager/PluginManager.py	Tue Dec 29 15:13:23 2015 +0100
@@ -1102,7 +1102,7 @@
         Public method to check the availability of updates of plug-ins.
         """
         period = Preferences.getPluginManager("UpdatesCheckInterval")
-        if period == 0:
+        if period == 0 or not self.__ui.isOnline():
             return
         elif period in [1, 2, 3]:
             lastModified = QFileInfo(self.pluginRepositoryFile).lastModified()