diff --git a/src/calibre/gui2/__init__.py b/src/calibre/gui2/__init__.py
index ca6749ffab..8b462b14f5 100644
--- a/src/calibre/gui2/__init__.py
+++ b/src/calibre/gui2/__init__.py
@@ -59,7 +59,7 @@ def human_readable(size):
     elif size < 1024*1024*1024: 
         divisor, suffix = 1024*1024, "MB"
     elif size < 1024*1024*1024*1024: 
-        divisor, suffix = 1024*1024, "GB"
+        divisor, suffix = 1024*1024*1024, "GB"
     size = str(size/divisor)
     if size.find(".") > -1: 
         size = size[:size.find(".")+2]
diff --git a/src/calibre/gui2/main.py b/src/calibre/gui2/main.py
index 1a44264dca..609946ec98 100644
--- a/src/calibre/gui2/main.py
+++ b/src/calibre/gui2/main.py
@@ -221,8 +221,7 @@ class Main(MainWindow, Ui_MainWindow):
         '''
         if connected:    
             self.device_manager = DeviceManager(device)
-            func = self.device_manager.info_func()
-            self.job_manager.run_device_job(self.info_read, func)
+            self.job_manager.run_device_job(self.info_read, self.device_manager.info_func())
             self.set_default_thumbnail(device.THUMBNAIL_HEIGHT)
             self.status_bar.showMessage('Device: '+device.__class__.__name__+' detected.', 3000)
             self.action_sync.setEnabled(True)