diff --git a/rocket/src/main/scala/core.scala b/rocket/src/main/scala/core.scala
index e0e23c28..f4c8dc18 100644
--- a/rocket/src/main/scala/core.scala
+++ b/rocket/src/main/scala/core.scala
@@ -1,8 +1,9 @@
 package rocket
 
 import Chisel._
-import uncore.constants.MemoryOpConstants._
 import Util._
+import uncore.HTIFIO
+import uncore.constants.MemoryOpConstants._
 
 class RocketIO(implicit conf: RocketConfiguration) extends Bundle
 {
diff --git a/rocket/src/main/scala/dpath.scala b/rocket/src/main/scala/dpath.scala
index e6951109..0f5255fc 100644
--- a/rocket/src/main/scala/dpath.scala
+++ b/rocket/src/main/scala/dpath.scala
@@ -3,6 +3,7 @@ package rocket
 import Chisel._
 import Instructions._
 import Util._
+import uncore.HTIFIO
 import uncore.constants.AddressConstants._
 
 class Datapath(implicit conf: RocketConfiguration) extends Module
diff --git a/rocket/src/main/scala/dpath_util.scala b/rocket/src/main/scala/dpath_util.scala
index a5dffc45..b41d4e57 100644
--- a/rocket/src/main/scala/dpath_util.scala
+++ b/rocket/src/main/scala/dpath_util.scala
@@ -3,6 +3,7 @@ package rocket
 import Chisel._
 import Util._
 import Node._
+import uncore.HTIFIO
 import uncore.constants.AddressConstants._
 import scala.math._