| 1 | diff --git a/src/sugar/graphics/window.py b/src/sugar/graphics/window.py |
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| 2 | index 1ad2bca..e82b3b9 100644 |
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| 3 | --- a/src/sugar/graphics/window.py |
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| 4 | +++ b/src/sugar/graphics/window.py |
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| 5 | @@ -192,7 +192,7 @@ class Window(gtk.Window): |
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| 6 | def __key_press_cb(self, widget, event): |
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| 7 | key = gtk.gdk.keyval_name(event.keyval) |
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| 8 | if event.state & gtk.gdk.MOD1_MASK: |
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| 9 | - if key == 'space': |
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| 10 | + if self.tray is not None and key == 'space': |
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| 11 | self.tray.props.visible = not self.tray.props.visible |
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| 12 | return True |
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| 13 | elif key == 'Escape' and self._is_fullscreen and \ |
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