diff --git a/src/main/scala/lib/beh_ib_func.scala b/src/main/scala/lib/beh_ib_func.scala
index 76dfcbc1..b1e707a1 100644
--- a/src/main/scala/lib/beh_ib_func.scala
+++ b/src/main/scala/lib/beh_ib_func.scala
@@ -216,7 +216,7 @@ object beh_ib_func {
     obj.io.clk := clk
     obj.io.en := en
     obj.io.scan_mode := scan_mode
-    withClock(clk) {
+    withClock(l1clk) {
       RegNext(din,0.U)
     }
   }