diff --git a/uncore/src/consts.scala b/uncore/src/consts.scala
index 29be0acc..0b885352 100644
--- a/uncore/src/consts.scala
+++ b/uncore/src/consts.scala
@@ -78,7 +78,7 @@ trait MemoryInterfaceConstants extends
 }
 
 trait AddressConstants { 
-  val PADDR_BITS = 40;
+  val PADDR_BITS = 32
   val VADDR_BITS = 43;
   val PGIDX_BITS = 13;
   val PPN_BITS = PADDR_BITS-PGIDX_BITS;