diff --git a/include/verilated.h b/include/verilated.h
index 804d07b1c..1ddb07ca3 100644
--- a/include/verilated.h
+++ b/include/verilated.h
@@ -288,6 +288,7 @@ public:
     /// Record command line arguments, for retrieval by $test$plusargs/$value$plusargs
     static void commandArgs(int argc, const char** argv);
     static void commandArgs(int argc, char** argv) { commandArgs(argc,(const char**)argv); }
+    static void commandArgsAdd(int argc, const char** argv);
     static CommandArgValues* getCommandArgs() {return &s_args;}
     /// Match plusargs with a given prefix. Returns static char* valid only for a single call
     static const char* commandArgsPlusMatch(const char* prefixp);
diff --git a/include/verilated_imp.h b/include/verilated_imp.h
index ecfb76d84..e54cf4654 100644
--- a/include/verilated_imp.h
+++ b/include/verilated_imp.h
@@ -92,7 +92,11 @@ public: // But only for verilated*.cpp
 
     // METHODS - arguments
     static void commandArgs(int argc, const char** argv) {
-	s_s.m_argVec.clear();
+	s_s.m_argVec.clear();  // Always clear
+	commandArgsAdd(argc, argv);
+    }
+    static void commandArgsAdd(int argc, const char** argv) {
+	if (!s_s.m_argVecLoaded) s_s.m_argVec.clear();
 	for (int i=0; i<argc; i++) s_s.m_argVec.push_back(argv[i]);
 	s_s.m_argVecLoaded = true; // Can't just test later for empty vector, no arguments is ok
     }