diff --git a/uncore/src/coherence.scala b/uncore/src/coherence.scala
index d7cf1ded..e8aad9d0 100644
--- a/uncore/src/coherence.scala
+++ b/uncore/src/coherence.scala
@@ -4,7 +4,7 @@ import Chisel._
 import Constants._
 
 object cpuCmdToRW {
-  def apply(cmd: Bits): (Bool, Bool) = (isRead(cmd), isWrite(cmd))
+  def apply(cmd: Bits): (Bool, Bool) = (isRead(cmd) || isPrefetch(cmd), isWrite(cmd))
 }
 
 abstract class CoherencePolicy {