diff --git a/src/wizard.py b/src/wizard.py
index d3735aba2..67a58cae1 100644
--- a/src/wizard.py
+++ b/src/wizard.py
@@ -261,6 +261,7 @@ class WizardGTK:
         import deluge.common
         firstrun = open(os.path.join(deluge.common.CONFIG_DIR, 'firstrun'), 'w')
         firstrun.write("")
+        firstrun.close()
 
     def cancel(self, *args):
         """