diff --git a/src/textual/_parser.py b/src/textual/_parser.py
index f77f1d084b..e723139b2d 100644
--- a/src/textual/_parser.py
+++ b/src/textual/_parser.py
@@ -118,7 +118,7 @@ def parse(
         """Implement to parse a stream of text.
 
         Args:
-            on_token: Callable to report a successful parsed data type.
+            token_callback: Callable to report a successful parsed data type.
 
         Yields:
             ParseAwaitable: One of `self.read1` or `self.peek1`