diff --git a/src/main/resources/csrc/SimMemTrace.cc b/src/main/resources/csrc/SimMemTrace.cc
index 20960b6..db9a57d 100644
--- a/src/main/resources/csrc/SimMemTrace.cc
+++ b/src/main/resources/csrc/SimMemTrace.cc
@@ -75,7 +75,8 @@ MemTraceLine MemTraceReader::read_trace_at(const long cycle,
     // read it right now.
     return MemTraceLine{};
   } else if (line.cycle == cycle && line.lane_id == lane_id) {
-    printf("fire! cycle=%ld, valid=%d, %s \n", cycle, line.valid, line.loadstore);
+    printf("fire! cycle=%ld, valid=%d, %s \n", cycle, line.valid,
+           line.loadstore);
 
     // FIXME! Currently lane_id is assumed to be in round-robin order, e.g.
     // 0->1->2->3->0->..., both in the trace file and the order the caller calls
@@ -91,6 +92,23 @@ MemTraceLine MemTraceReader::read_trace_at(const long cycle,
 }
 
 extern "C" void memtrace_init(const char *filename) {
+#ifndef NO_VPI
+  s_vpi_vlog_info info;
+  if (!vpi_get_vlog_info(&info)) {
+    fprintf(stderr, "fatal: failed to get plusargs from VCS\n");
+    exit(1);
+  }
+  const char* TRACEFILENAME_PLUSARG = "+memtracefile=";
+  for (int i = 0; i < info.argc; i++) {
+    char* input_arg = info.argv[i];
+    if (strncmp(input_arg, TRACEFILENAME_PLUSARG,
+                strlen(TRACEFILENAME_PLUSARG)) == 0) {
+      filename = input_arg + strlen(TRACEFILENAME_PLUSARG);
+      break;
+    }
+  }
+#endif
+
   printf("memtrace_init: filename=[%s]\n", filename);
 
   reader = std::make_unique<MemTraceReader>(filename);