diff --git a/dataflow_neuro/primitives.act b/dataflow_neuro/primitives.act
index aac9eb3..b07153a 100644
--- a/dataflow_neuro/primitives.act
+++ b/dataflow_neuro/primitives.act
@@ -151,7 +151,7 @@ namespace tmpl {
         }
     
         export template<pint N>
-        defproc demux (avMx1of2<N> in; avMx1of2<N> out1; avMx1of2<N> out2; bool? reset_B; power supply) {
+        defproc demux (avMx1of2<N> in; avMx1of2<N> out1; avMx1of2<N> out2; bool? reset_B, c_t, c_f; power supply) {
             //control
             bool _en, _reset_BX,_reset_BXX[N], _out_v;