diff --git a/doc/ssl/SSL_library_init.pod b/doc/ssl/SSL_library_init.pod
index ecf3c4858e528849a4d677a56054c94112d22331..eed526e47efec90a3f035b1be2168e4730e5c587 100644
--- a/doc/ssl/SSL_library_init.pod
+++ b/doc/ssl/SSL_library_init.pod
@@ -23,6 +23,7 @@ for SSL_library_init().
 =head1 NOTES
 
 SSL_library_init() must be called before any other action takes place.
+SSL_library_init() is not reentrant. 
 
 =head1 WARNING