diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 7a3f642..2b9a679 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -404,7 +404,7 @@
    if the object type does not provide means to retrieve the size and would
    cause a `TypeError`.
 
-   func:`getsizeof` calls the object's __sizeof__ method and adds an additional
+   :func:`getsizeof` calls the object's __sizeof__ method and adds an additional
    garbage collector overhead if the object is managed by the garbage collector.
 
    .. versionadded:: 2.6