fix use of undefined markup

diff --git a/Doc/api/concrete.tex b/Doc/api/concrete.tex
index 7ad6e91617f3f374ba092430433c8a1f3c3c24c7..bf8d4388e06870355883cb38973349fbf9794cb6 100644 (file)
--- a/Doc/api/concrete.tex
+++ b/Doc/api/concrete.tex
@@ -98,7 +98,7 @@ There is no \cfunction{PyNone_Check()} function for the same reason.
 \end{cvardesc}
 
 \begin{csimplemacrodesc}{Py_RETURN_NONE}
-  Properly handles returning \cvar{Py_None} from within a C function.
+  Properly handles returning \cdata{Py_None} from within a C function.
 \end{csimplemacrodesc}