diff --git a/rocket/src/main/scala/cpu.scala b/rocket/src/main/scala/cpu.scala
index b87e7549..96b33035 100644
--- a/rocket/src/main/scala/cpu.scala
+++ b/rocket/src/main/scala/cpu.scala
@@ -161,7 +161,8 @@ class rocketProc extends Component
     ctrl.io.vec_iface.vcmdq_ready := vu.io.vec_cmdq.ready
     ctrl.io.vec_iface.vximm1q_ready := vu.io.vec_ximm1q.ready
     ctrl.io.vec_iface.vximm2q_ready := vu.io.vec_ximm2q.ready
-    vu.io.vec_ackq.ready := Bool(true)
+    ctrl.io.vec_iface.vackq_valid := vu.io.vec_ackq.valid
+    vu.io.vec_ackq.ready := ctrl.io.vec_iface.vackq_ready
 
     // hooking up vector memory interface
     ctrl.io.ext_mem.req_val := vu.io.dmem_req.valid
diff --git a/rocket/src/main/scala/ctrl.scala b/rocket/src/main/scala/ctrl.scala
index e593dac7..3723ca36 100644
--- a/rocket/src/main/scala/ctrl.scala
+++ b/rocket/src/main/scala/ctrl.scala
@@ -580,7 +580,18 @@ class rocketCtrl extends Component
     val vec = new rocketCtrlVec()
 
     io.vec_dpath <> vec.io.dpath
-    io.vec_iface <> vec.io.iface
+
+    io.vec_iface.vcmdq_valid := vec.io.iface.vcmdq_valid
+    io.vec_iface.vximm1q_valid := vec.io.iface.vximm1q_valid
+    io.vec_iface.vximm2q_valid := vec.io.iface.vximm2q_valid
+    vec.io.iface.vcmdq_ready := io.vec_iface.vcmdq_ready
+    vec.io.iface.vximm1q_ready := io.vec_iface.vximm1q_ready
+    vec.io.iface.vximm2q_ready := io.vec_iface.vximm2q_ready
+
+    // FIXME
+    // use io.vec_iface.vackq_valid
+    io.vec_iface.vackq_ready := Bool(true)
+
     vec_replay = vec.io.replay
 
     vec.io.sr_ev := io.dpath.status(SR_EV)
diff --git a/rocket/src/main/scala/ctrl_vec.scala b/rocket/src/main/scala/ctrl_vec.scala
index 2c2897d8..1d63cec0 100644
--- a/rocket/src/main/scala/ctrl_vec.scala
+++ b/rocket/src/main/scala/ctrl_vec.scala
@@ -24,6 +24,8 @@ class ioCtrlVecInterface extends Bundle
   val vximm1q_ready = Bool(INPUT)
   val vximm2q_valid = Bool(OUTPUT)
   val vximm2q_ready = Bool(INPUT)
+  val vackq_valid = Bool(INPUT)
+  val vackq_ready = Bool(OUTPUT)
 }
 
 class ioCtrlVec extends Bundle