diff --git a/generators/chipyard/src/main/scala/config/RocketConfigs.scala b/generators/chipyard/src/main/scala/config/RocketConfigs.scala
index 8ccf698a..1888fc5a 100644
--- a/generators/chipyard/src/main/scala/config/RocketConfigs.scala
+++ b/generators/chipyard/src/main/scala/config/RocketConfigs.scala
@@ -21,10 +21,12 @@ class TinyRocketConfig extends Config(
   new freechips.rocketchip.subsystem.With1TinyCore ++             // single tiny rocket-core
   new chipyard.config.AbstractConfig)
 
+// DOC include start: FFTRocketConfig
 class FFTRocketConfig extends Config(
   new fftgenerator.WithFFTGenerator(baseAddr=0x2000, numPoints=8, width=16, decPt=8) ++ // add 8-point mmio fft at 0x2000 with 16bit fixed-point numbers.
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++
   new chipyard.config.AbstractConfig)
+// DOC include end: FFTRocketConfig
 
 class HwachaRocketConfig extends Config(
   new chipyard.config.WithHwachaTest ++