diff --git a/Lib/distutils/dist.py b/Lib/distutils/dist.py
index a23a773c5735..1a39022fd8af 100644
--- a/Lib/distutils/dist.py
+++ b/Lib/distutils/dist.py
@@ -230,6 +230,7 @@ class Distribution:
                     setattr(self.metadata, key, val)
                 elif hasattr(self, key):
                     setattr(self, key, val)
+                else:
                     msg = "Unknown distribution option: %s" % repr(key)
                     if warnings is not None:
                         warnings.warn(msg)