diff --git a/dataflow_neuro/primitives.act b/dataflow_neuro/primitives.act
index a06236f..7d3a97b 100644
--- a/dataflow_neuro/primitives.act
+++ b/dataflow_neuro/primitives.act
@@ -647,7 +647,7 @@ namespace tmpl {
                 // Delays
                 dly[i_delay].a = and2[i].y;
                 i_delay = i_delay + 1;
-                (j:1..i-1:
+                (j:1..(1<<i)-1:
                     dly[i_delay].a = dly[i_delay-1].y;
                     i_delay = i_delay +1;
                 )