diff --git a/image_creator/dialog_wizard.py b/image_creator/dialog_wizard.py
index 0856d8ae1a7768cfaa6d03324ea6991b94497ed6..ffabecf0b6f66a0efe81f65d4179baabed72ab96 100644
--- a/image_creator/dialog_wizard.py
+++ b/image_creator/dialog_wizard.py
@@ -414,7 +414,8 @@ def create_image(session):
         out.clear()
 
         #Sysprep
-        image.os.sysprep_params.update(wizard['SysprepParams'])
+        if 'SysprepParams' in wizard:
+            image.os.sysprep_params.update(wizard['SysprepParams'])
         image.os.do_sysprep()
         metadata = image.os.meta