diff --git a/vsrc/TestDriver.v b/vsrc/TestDriver.v
index c0b4d50e..554480d2 100644
--- a/vsrc/TestDriver.v
+++ b/vsrc/TestDriver.v
@@ -22,7 +22,7 @@ module TestDriver;
   int unsigned rand_value;
   initial
   begin
-    $value$plusargs("max-cycles=%d", max_cycles);
+    void'($value$plusargs("max-cycles=%d", max_cycles));
     verbose = $test$plusargs("verbose");
 
     // do not delete the line below.