diff --git a/src/main/scala/coreplex/Configs.scala b/src/main/scala/coreplex/Configs.scala
index 304ca115..cd7be71d 100644
--- a/src/main/scala/coreplex/Configs.scala
+++ b/src/main/scala/coreplex/Configs.scala
@@ -100,7 +100,7 @@ class BaseCoreplexConfig extends Config (
       case UseCompressed => true
       case DMKey => new DefaultDebugModuleConfig(site(NTiles), site(XLen))
       case NCustomMRWCSRs => 0
-      case MtvecInit => None
+      case MtvecInit => Some(BigInt(0))
       case MtvecWritable => true
       //Uncore Paramters
       case LNEndpoints => site(TLKey(site(TLId))).nManagers + site(TLKey(site(TLId))).nClients