diff --git a/scribblings/networks.scrbl b/scribblings/networks.scrbl
index c25ab53..3fbbdc0 100644
--- a/scribblings/networks.scrbl
+++ b/scribblings/networks.scrbl
@@ -10,7 +10,7 @@ is a set of variables which are updated according to their corresponding update
 functions.  The variables to be updated at each step are given by the mode.
 This model can generalise Boolean networks, TBANs, multivalued networks, etc.
 
-@section{Basic definitions}
+@section[#:tag "networks-basics"]{Basic definitions}
 
 @section{Syntactic description of networks}