diff --git a/Include/cpython/abstract.h b/Include/cpython/abstract.h
index d57aa54..62a113f 100644
--- a/Include/cpython/abstract.h
+++ b/Include/cpython/abstract.h
@@ -88,8 +88,7 @@
    of keyword arguments does not change nargsf). kwnames can also be NULL if
    there are no keyword arguments.
 
-   keywords must only contains str strings (no subclass), and all keys must
-   be unique.
+   keywords must only contain strings and all keys must be unique.
 
    Return the result on success. Raise an exception and return NULL on
    error. */