diff --git a/generators/chipyard/src/main/scala/config/RocketConfigs.scala b/generators/chipyard/src/main/scala/config/RocketConfigs.scala
index cbc102d3..a87eb6b7 100644
--- a/generators/chipyard/src/main/scala/config/RocketConfigs.scala
+++ b/generators/chipyard/src/main/scala/config/RocketConfigs.scala
@@ -22,7 +22,7 @@ class TinyRocketConfig extends Config(
   new chipyard.config.AbstractConfig)
 
 class FFTRocketConfig extends Config(
-  new fftgenerator.WithFFTGenerator(baseAddr=0x2000, numPoints=8) ++
+  new fftgenerator.WithFFTGenerator(baseAddr=0x2000, numPoints=8, width=16, decPt=8) ++
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++
   new chipyard.config.AbstractConfig)