diff --git a/Lib/string.py b/Lib/string.py
index de364de..a061558 100644
--- a/Lib/string.py
+++ b/Lib/string.py
@@ -232,6 +232,7 @@
                 result.append(self.format_field(obj, format_spec))
 
         self.check_unused_args(used_args, args, kwargs)
+        self.check_unused_args(used_args, args, kwargs)
         return ''.join(result)