update to new C roles and directives
diff --git a/Doc/library/msvcrt.rst b/Doc/library/msvcrt.rst
index 4fc553f..d7fd3fb 100644
--- a/Doc/library/msvcrt.rst
+++ b/Doc/library/msvcrt.rst
@@ -152,5 +152,5 @@
 
 .. function:: heapmin()
 
-   Force the :cfunc:`malloc` heap to clean itself up and return unused blocks to
+   Force the :c:func:`malloc` heap to clean itself up and return unused blocks to
    the operating system.  On failure, this raises :exc:`IOError`.