diff --git a/src/main/scala/uncore/devices/Plic.scala b/src/main/scala/uncore/devices/Plic.scala
index 3629a216..9ecc8021 100644
--- a/src/main/scala/uncore/devices/Plic.scala
+++ b/src/main/scala/uncore/devices/Plic.scala
@@ -79,7 +79,7 @@ class TLPLIC(params: PLICParams)(implicit p: Parameters) extends LazyModule
     address   = Seq(params.address),
     device    = device,
     beatBytes = p(XLen)/8,
-    undefZero = false,
+    undefZero = true,
     concurrency = 1) // limiting concurrency handles RAW hazards on claim registers
 
   val intnode = IntNexusNode(