diff --git a/chisel/playground/src/pipeline/decoder/Decoder.scala b/chisel/playground/src/pipeline/decoder/Decoder.scala
index 52bf3bd..969abc5 100644
--- a/chisel/playground/src/pipeline/decoder/Decoder.scala
+++ b/chisel/playground/src/pipeline/decoder/Decoder.scala
@@ -38,7 +38,7 @@ class Decoder extends Module with HasInstrType {
 
   io.out.inst_info.valid      := false.B
   io.out.inst_info.inst_legal := instrType =/= InstrN
-  io.out.inst_info.reg1_ren   := src1Type === SrcType.reg
+  io.out.inst_info.reg1_ren   := src1Type === SrcType.reg || inst(6, 0) === "b0110111".U // fix LUI
   io.out.inst_info.reg1_raddr := Mux(src1Type === SrcType.reg, rs, 0.U)
   io.out.inst_info.reg2_ren   := src2Type === SrcType.reg
   io.out.inst_info.reg2_raddr := Mux(src2Type === SrcType.reg, rt, 0.U)