diff --git a/hw/rtl/VX_platform.vh b/hw/rtl/VX_platform.vh
index 6ceeecb1..ce28a9c0 100644
--- a/hw/rtl/VX_platform.vh
+++ b/hw/rtl/VX_platform.vh
@@ -78,7 +78,6 @@
 `define UNUSED_VAR(x)
 `define UNUSED_PIN(x) . x ()
 `define UNUSED_ARG(x) x
-`define TRACE(level, args) $write args
 `else // !SYNTHESIS
 `ifdef VERILATOR
 `define SIMULATION
diff --git a/hw/rtl/libs/VX_mem_scheduler.sv b/hw/rtl/libs/VX_mem_scheduler.sv
index ae34812b..2343be6f 100644
--- a/hw/rtl/libs/VX_mem_scheduler.sv
+++ b/hw/rtl/libs/VX_mem_scheduler.sv
@@ -530,6 +530,7 @@ module VX_mem_scheduler #(
 
     ///////////////////////////////////////////////////////////////////////////
 
+`ifdef SIMULATION
 `ifndef NDEBUG
     wire [NUM_BANKS-1:0] mem_req_fire_s = mem_req_valid_s & mem_req_ready_s;
     always @(negedge clk) begin
@@ -598,7 +599,8 @@ module VX_mem_scheduler #(
             end
         end
     end
-`endif
+`endif // NDEBUG
+`endif // SIMULATION
   
 endmodule
 `TRACING_ON