diff --git a/ext/VexRiscv b/ext/VexRiscv
index 03471736..7723afc0 160000
--- a/ext/VexRiscv
+++ b/ext/VexRiscv
@@ -1 +1 @@
-Subproject commit 03471736e164a7cb8e31084e0254a6b973615169
+Subproject commit 7723afc083035e349151d0a3cf8293e2b6a77408
diff --git a/hardware/scala/saxon/Misc.scala b/hardware/scala/saxon/Misc.scala
index b143b04a..776eb203 100644
--- a/hardware/scala/saxon/Misc.scala
+++ b/hardware/scala/saxon/Misc.scala
@@ -51,7 +51,8 @@ object BspGenerator {
 //      val gName = camelToUpperCase(g.getName())
 
       def rec(prefix : String, value : Any): Unit = value match {
-        case value : Int => headerWriter.println(s"#define ${prefix} $value")
+        case value: Int => headerWriter.println(s"#define ${prefix} $value")
+        case value: BigInt => headerWriter.println(f"#define ${prefix} 0x${value}%x")
         case value : FixedFrequency => headerWriter.println(s"#define ${prefix} ${value.getValue.toBigDecimal.toBigInt.toString(10)}")
         case value : Boolean => headerWriter.println(s"#define ${prefix} ${if(value) 1 else 0}")
         case value : SpinalEnumElement[_] =>  headerWriter.println(s"#define ${prefix} $value")