diff --git a/ev.pod b/ev.pod
index 2de0277..bb1f95a 100644
--- a/ev.pod
+++ b/ev.pod
@@ -3919,6 +3919,10 @@ to add as long as they only need one additional pointer for context. If
 you need support for other types of functors please contact the author
 (preferably after implementing it).
 
+For all this to work, your C++ compiler either has to use the same calling
+conventions as your C compiler (for static member functions), or you have
+to embed libev and compile libev itself as C++.
+
 Here is a list of things available in the C<ev> namespace:
 
 =over 4