diff --git a/docs/development/c-bindings.rst b/docs/development/c-bindings.rst
index 9388958..43ec4d8 100644
--- a/docs/development/c-bindings.rst
+++ b/docs/development/c-bindings.rst
@@ -128,9 +128,7 @@
         ...;
     } QM_TRANSMOGRIFICATION_CTX;
 
-Confusingly, functions that aren't always available on all supported
-versions of the library, should be defined in ``MACROS`` and *not* in
-``FUNCTIONS``. Fortunately, you just have to copy the signature::
+For functions just add the signature to ``FUNCTIONS``::
 
     int QM_transmogrify(QM_TRANSMOGRIFICATION_CTX *, int);