diff --git a/src/main/scala/vexriscv/plugin/CfuPlugin.scala b/src/main/scala/vexriscv/plugin/CfuPlugin.scala
index 9a93f6c..d343640 100644
--- a/src/main/scala/vexriscv/plugin/CfuPlugin.scala
+++ b/src/main/scala/vexriscv/plugin/CfuPlugin.scala
@@ -101,7 +101,8 @@ class CfuPlugin(val stageCount : Int,
                 val busParameter : CfuBusParameter,
                 val encodings : List[CfuPluginEncoding] = null,
                 val stateAndIndexCsrOffset : Int = 0xBC0,
-                val statusCsrOffset : Int = 0x801) extends Plugin[VexRiscv]{
+                val statusCsrOffset : Int = 0x801,
+                val withEnable : Boolean = true) extends Plugin[VexRiscv]{
   def p = busParameter
 
   assert(p.CFU_INPUTS <= 2)
@@ -158,8 +159,8 @@ class CfuPlugin(val stageCount : Int,
 
     val csr = pipeline plug new Area{
       val factory = pipeline.service(classOf[CsrInterface])
-      val en = Reg(Bool()) init(False)
-      factory.rw(stateAndIndexCsrOffset, 31, en)
+      val en = withEnable generate (Reg(Bool()) init(False))
+      if(withEnable) factory.rw(stateAndIndexCsrOffset, 31, en)
 
       val stateId = Reg(UInt(log2Up(p.CFU_STATE_INDEX_NUM) bits)) init(0)
       if(p.CFU_STATE_INDEX_NUM > 1) {
@@ -181,7 +182,7 @@ class CfuPlugin(val stageCount : Int,
       }
     }
 
-    when(decode.input(CFU_ENABLE) && !csr.en){
+    if(withEnable) when(decode.input(CFU_ENABLE) && !csr.en){
       pipeline.service(classOf[DecoderService]).forceIllegal()
     }