diff --git a/test_regress/t/t_mem_multi_io2.cpp b/test_regress/t/t_mem_multi_io2.cpp
index b495e661f..e85dc87da 100644
--- a/test_regress/t/t_mem_multi_io2.cpp
+++ b/test_regress/t/t_mem_multi_io2.cpp
@@ -19,7 +19,12 @@ void check(const char* bus, int got, int exp) {
     }
 }
 
-int main() {
+#ifdef SYSTEMC_VERSION
+int sc_main(int, char**)
+#else
+int main()
+#endif
+{
     Verilated::debug(0);
     tb = new VM_PREFIX ("tb");
 
diff --git a/test_regress/t/t_mem_multi_io3.cpp b/test_regress/t/t_mem_multi_io3.cpp
index 4df0e1970..7aa4f4751 100644
--- a/test_regress/t/t_mem_multi_io3.cpp
+++ b/test_regress/t/t_mem_multi_io3.cpp
@@ -12,7 +12,12 @@ double sc_time_stamp() {
     return 0;
 }
 
-int main() {
+#ifdef SYSTEMC_VERSION
+int sc_main(int, char**)
+#else
+int main()
+#endif
+{
     Verilated::debug(0);
     tb = new VM_PREFIX ("tb");