diff --git a/sim/midas/src/main/scala/midas/widgets/AXI4TieOff.scala b/sim/midas/src/main/scala/midas/widgets/AXI4TieOff.scala
index 1f79836d..cee7173e 100644
--- a/sim/midas/src/main/scala/midas/widgets/AXI4TieOff.scala
+++ b/sim/midas/src/main/scala/midas/widgets/AXI4TieOff.scala
@@ -2,6 +2,7 @@
 
 package midas.widgets
 
+import chisel3._
 import freechips.rocketchip.config.Parameters
 import freechips.rocketchip.diplomacy._
 import freechips.rocketchip.amba.axi4._