Fix a typo in a variable name

diff --git a/image_creator/os_type/windows.py b/image_creator/os_type/windows.py
index 3592500..994a7b0 100644 (file)
--- a/image_creator/os_type/windows.py
+++ b/image_creator/os_type/windows.py
@@ -280,7 +280,7 @@ class Windows(OSBase):
         txt = "System preparation parameter: `%s' is needed but missing!"
         for name, param in self.needed_sysprep_params.items():
             if name not in self.sysprep_params:
-                raise FatalError(txt % param)
+                raise FatalError(txt % name)
 
         self.mount(readonly=False)
         try: