diff --git a/generators/chipyard/src/main/scala/config/SpikeConfigs.scala b/generators/chipyard/src/main/scala/config/SpikeConfigs.scala
index b9cd8a96..34413b36 100644
--- a/generators/chipyard/src/main/scala/config/SpikeConfigs.scala
+++ b/generators/chipyard/src/main/scala/config/SpikeConfigs.scala
@@ -13,9 +13,7 @@ class SpikeConfig extends Config(
 class dmiSpikeConfig extends Config(
   new chipyard.harness.WithSerialAdapterTiedOff ++               // don't attach an external SimSerial
   new chipyard.config.WithDMIDTM ++                              // have debug module expose a clocked DMI port
-  new chipyard.WithNSpikeCores(1) ++
-  new chipyard.config.AbstractConfig)
-
+  new SpikeConfig)
 
 // Avoids polling on the UART registers
 class SpikeFastUARTConfig extends Config(
@@ -36,6 +34,11 @@ class SpikeUltraFastConfig extends Config(
   new chipyard.config.WithBroadcastManager ++
   new chipyard.config.AbstractConfig)
 
+class dmiSpikeUltraFastConfig extends Config(
+  new chipyard.harness.WithSerialAdapterTiedOff ++               // don't attach an external SimSerial
+  new chipyard.config.WithDMIDTM ++                              // have debug module expose a clocked DMI port
+  new SpikeUltraFastConfig)
+
 // Add the default firechip devices
 class SpikeUltraFastDevicesConfig extends Config(
   new chipyard.harness.WithSimBlockDevice ++