diff --git a/src/main/scala/vexriscv/demo/Briey.scala b/src/main/scala/vexriscv/demo/Briey.scala
index 053abf8..57872a9 100644
--- a/src/main/scala/vexriscv/demo/Briey.scala
+++ b/src/main/scala/vexriscv/demo/Briey.scala
@@ -14,6 +14,7 @@ import spinal.lib.graphic.RgbConfig
 import spinal.lib.graphic.vga.{Axi4VgaCtrl, Axi4VgaCtrlGenerics, Vga}
 import spinal.lib.io.TriStateArray
 import spinal.lib.memory.sdram._
+import spinal.lib.memory.sdram.sdr.{Axi4SharedSdramCtrl, IS42x320D, SdramInterface, SdramLayout, SdramTimings}
 import spinal.lib.misc.HexTools
 import spinal.lib.soc.pinsec.{PinsecTimerCtrl, PinsecTimerCtrlExternal}
 import spinal.lib.system.debugger.{JtagAxi4SharedDebugger, JtagBridge, SystemDebugger, SystemDebuggerConfig}