work on new style literal accessors

1 files changed, 2 insertions, 2 deletions

diff --git a/src/main/scala/chisel3/util/Conditional.scala b/src/main/scala/chisel3/util/Conditional.scala
index 860ffde3..f558b7ba 100644
--- a/src/main/scala/chisel3/util/Conditional.scala
+++ b/src/main/scala/chisel3/util/Conditional.scala
@@ -28,8 +28,8 @@ class SwitchContext[T <: Bits](cond: T, whenContext: Option[WhenContext], lits:
   def is(v: Iterable[T])(block: => Unit): SwitchContext[T] = {
     if (!v.isEmpty) {
       val newLits = v.map { w =>
-        require(w.isLit, "is conditions must be literals!")
-        val value = w.litValue
+        require(w.litToBigIntOption != None, "is condition must be literal")
+        val value = w.litToBigInt
         require(!lits.contains(value), "all is conditions must be mutually exclusive!")
         value
       }