diff --git a/docs/Customization/Heterogeneous-SoCs.rst b/docs/Customization/Heterogeneous-SoCs.rst
index df5043c3b0..380ccb102c 100644
--- a/docs/Customization/Heterogeneous-SoCs.rst
+++ b/docs/Customization/Heterogeneous-SoCs.rst
@@ -48,7 +48,7 @@ An example is shown below with two BOOM cores, and one Rocket tile with a RoCC a
     :start-after: DOC include start: DualBoomAndRocketOneHwacha
     :end-before: DOC include end: DualBoomAndRocketOneHwacha
 
-The ``WithMultiRoCCHwacha`` config fragment assigns a Hwacha accelerator to a particular ``hartId`` (in this case, the ``hartId`` of ``2`` corresponds to the Rocket core).
+The ``WithMultiRoCCHwacha`` config fragment assigns a Hwacha accelerator to a particular ``hartId`` (in this case, the ``hartId`` of ``0`` corresponds to the Rocket core).
 Finally, the ``WithMultiRoCC`` config fragment is called.
 This config fragment sets the ``BuildRoCC`` key to use the ``MultiRoCCKey`` instead of the default.
 This must be used after all the RoCC parameters are set because it needs to override the ``BuildRoCC`` parameter.
diff --git a/generators/chipyard/src/main/scala/config/HeteroConfigs.scala b/generators/chipyard/src/main/scala/config/HeteroConfigs.scala
index 55d2f77074..28cdc4cb20 100644
--- a/generators/chipyard/src/main/scala/config/HeteroConfigs.scala
+++ b/generators/chipyard/src/main/scala/config/HeteroConfigs.scala
@@ -20,16 +20,23 @@ class HwachaLargeBoomAndHwachaRocketConfig extends Config(
   new chipyard.config.AbstractConfig)
 // DOC include end: BoomAndRocketWithHwacha
 
-// DOC include start: DualBoomAndRocketOneHwacha
 class LargeBoomAndHwachaRocketConfig extends Config(
   new chipyard.config.WithMultiRoCC ++                                  // support heterogeneous rocc
-  new chipyard.config.WithMultiRoCCHwacha(1) ++                         // put hwacha on hart-1 (rocket)
+  new chipyard.config.WithMultiRoCCHwacha(0) ++                         // put hwacha on hart-0 (rocket)
   new hwacha.DefaultHwachaConfig ++                                     // set default hwacha config keys
   new boom.common.WithNLargeBooms(1) ++                                 // add 1 boom core
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++                // add 1 rocket core
   new chipyard.config.AbstractConfig)
-// DOC include end: DualBoomAndRocketOneHwacha
 
+// DOC include start: DualBoomAndRocketOneHwacha
+class DualLargeBoomAndHwachaRocketConfig extends Config(
+  new chipyard.config.WithMultiRoCC ++                                  // support heterogeneous rocc
+  new chipyard.config.WithMultiRoCCHwacha(0) ++                         // put hwacha on hart-0 (rocket)
+  new hwacha.DefaultHwachaConfig ++                                     // set default hwacha config keys
+  new boom.common.WithNLargeBooms(2) ++                                 // add 2 boom cores
+  new freechips.rocketchip.subsystem.WithNBigCores(1) ++                // add 1 rocket core
+  new chipyard.config.AbstractConfig)
+// DOC include end: DualBoomAndRocketOneHwacha
 
 class DualLargeBoomAndDualRocketConfig extends Config(
   new boom.common.WithNLargeBooms(2) ++                   // add 2 boom cores