diff --git a/praw/models/reddit/subreddit.py b/praw/models/reddit/subreddit.py
index 6e3a7e6f8..ad3b3bb11 100644
--- a/praw/models/reddit/subreddit.py
+++ b/praw/models/reddit/subreddit.py
@@ -2520,8 +2520,9 @@ def settings(self) -> Dict[str, Union[str, int, bool]]:
         url = API_PATH["subreddit_settings"].format(subreddit=self.subreddit)
         return self.subreddit._reddit.get(url)["data"]
 
+    @_deprecate_args("only")
     def spam(
-        self, only: Optional[str] = None, **generator_kwargs: Any
+        self, *, only: Optional[str] = None, **generator_kwargs: Any
     ) -> Iterator[Union["praw.models.Submission", "praw.models.Comment"]]:
         """Return a :class:`.ListingGenerator` for spam comments and submissions.