diff --git a/openlp/core/ui/themeform.py b/openlp/core/ui/themeform.py
index a03cbea3b..f459289f6 100644
--- a/openlp/core/ui/themeform.py
+++ b/openlp/core/ui/themeform.py
@@ -280,7 +280,7 @@ class ThemeForm(QtGui.QWizard, Ui_ThemeWizard):
         Run the wizard.
         """
         log.debug(u'Editing theme %s' % self.theme.theme_name)
-        self.theme.background_filename != u''
+        self.theme.background_filename = u''
         self.updateThemeAllowed = False
         self.setDefaults()
         self.updateThemeAllowed = True