diff --git a/src/main/scala/tile/RocketTile.scala b/src/main/scala/tile/RocketTile.scala
index fde37ab6..98849fef 100644
--- a/src/main/scala/tile/RocketTile.scala
+++ b/src/main/scala/tile/RocketTile.scala
@@ -27,7 +27,9 @@ case class RocketTileParams(
   require(dcache.isDefined)
 }
 
-abstract class HartedTile(tileParams: TileParams, val hartid: Int)(implicit p: Parameters) extends BaseTile(tileParams)(p)
+abstract class HartedTile(tileParams: TileParams, val hartid: Int)(implicit p: Parameters) extends BaseTile(tileParams)(p) {
+  require (log2Up(hartid + 1) <= p(MaxHartIdBits), s"p(MaxHartIdBits) of ${p(MaxHartIdBits)} is not enough for hartid ${hartid}")
+}
 
 class RocketTile(val rocketParams: RocketTileParams)(implicit p: Parameters) extends HartedTile(rocketParams, rocketParams.hartid)(p)
     with HasExternalInterrupts