diff --git a/Doc/library/ctypes.rst b/Doc/library/ctypes.rst
index 6be8debaf02c0c67930819162da1fdaaa5470fdf..882c50a99f1360a99a14a5372ff1c108ea9a34d1 100644
--- a/Doc/library/ctypes.rst
+++ b/Doc/library/ctypes.rst
@@ -2006,8 +2006,8 @@ Utility functions
 
 .. function:: sizeof(obj_or_type)
 
-   Returns the size in bytes of a ctypes type or instance memory buffer. Does the
-   same as the C ``sizeof()`` function.
+   Returns the size in bytes of a ctypes type or instance memory buffer.
+   Does the same as the C ``sizeof`` operator.
 
 
 .. function:: string_at(address[, size])