diff --git a/dataflow_neuro/dummy.act b/dataflow_neuro/dummy.act
index c9d7f29..6e81335 100644
--- a/dataflow_neuro/dummy.act
+++ b/dataflow_neuro/dummy.act
@@ -64,6 +64,8 @@ defproc dummy_neuron_block (a1of1 synapses[N_SYN], neuron; power supply){
 
 /**
  * Create an array of neuron dummy blocks.
+ * Note that this is custom made for the indexing on the texel chip.
+ * And so should be reused *with care*.
  */
 export template<pint N_SYN_PER_NRN, N_NRN, N_NRN_X>
 defproc dummy_neuron_core (a1of1 synapses[N_SYN_PER_NRN * N_NRN], neurons[N_NRN]; power supply){