diff --git a/dataflow_neuro/cell_lib_std.act b/dataflow_neuro/cell_lib_std.act
index 2ef126d..370a32f 100644
--- a/dataflow_neuro/cell_lib_std.act
+++ b/dataflow_neuro/cell_lib_std.act
@@ -99,6 +99,18 @@ namespace tmpl {
       sizing { _y {-6,2}; y {-12,4} }
     }
 
+    /*-- delay cells --*/
+    // TODO properly
+
+    export defcell DLY4_X1(bool! y; bool? a, vdd, vss)
+    {
+      bool _y;
+      prs {
+        a => _y-
+        _y => y-
+      }
+    }
+
       
     /*-- simple gates --*/