fix a minor typo
diff --git a/Doc/c-api/string.rst b/Doc/c-api/string.rst
index f2e543c..0ecfa23 100644
--- a/Doc/c-api/string.rst
+++ b/Doc/c-api/string.rst
@@ -124,7 +124,7 @@
 
 .. cfunction:: PyObject* PyString_FromFormatV(const char *format, va_list vargs)
 
-   Identical to :func:`PyString_FromFormat` except that it takes exactly two
+   Identical to :cfunc:`PyString_FromFormat` except that it takes exactly two
    arguments.