diff --git a/dataflow_neuro/primitives.act b/dataflow_neuro/primitives.act
index 732c4ee..2d50581 100644
--- a/dataflow_neuro/primitives.act
+++ b/dataflow_neuro/primitives.act
@@ -863,7 +863,8 @@ defproc slice_data(avMx1of2<N> in; avMx1of2<std::min(N1,N)-std::max(N0,0)> out;
 
 }
 
-
+  // this is a wrapper for the demux, such that the condition bit is absorbed into the data
+  // and demux msb is just defaulting it to the msb
   export template<pint N; pint CONDITION_BIT>
         defproc demux_bit (avMx1of2<N+1> in; avMx1of2<N> out1; avMx1of2<N> out2; bool? reset_B; power supply)
         {
diff --git a/test/unit_tests/demux_bit_7/test.prsim b/test/unit_tests/demux_bit_7/test.prsim
index 00fb94a..b53c09f 100644
--- a/test/unit_tests/demux_bit_7/test.prsim
+++ b/test/unit_tests/demux_bit_7/test.prsim
@@ -22,7 +22,7 @@ cycle
 
 system "echo 'Output neutral checked'"
 
-set-qdi-channel-valid "my_demux.in" 8 255
+set-qdi-channel-valid "my_demux.in" 8 254
 cycle
 assert my_demux.in.v 1
 assert my_demux.in.a 0
@@ -59,12 +59,12 @@ set my_demux.out2.a 0
 set my_demux.out2.v 0
 cycle
 
-set-qdi-channel-valid "my_demux.in" 8 100
+set-qdi-channel-valid "my_demux.in" 8 101
 cycle
 assert my_demux.in.v 1
 assert my_demux.in.a 0
 
-assert-qdi-channel-valid "my_demux.out2" 7 100
+assert-qdi-channel-valid "my_demux.out2" 7 50
 set my_demux.out2.v 1
 cycle
 assert my_demux.in.a 1