diff --git a/tgt-vvp/draw_net_input.c b/tgt-vvp/draw_net_input.c
index 2a078bb71..6e4859f89 100644
--- a/tgt-vvp/draw_net_input.c
+++ b/tgt-vvp/draw_net_input.c
@@ -546,7 +546,7 @@ static void display_multi_driver_error(ivl_nexus_t nex, unsigned ndrivers,
 static ivl_nexus_ptr_t *drivers = 0x0;
 static unsigned adrivers = 0;
 
-void EOC_cleanup_drivers()
+void EOC_cleanup_drivers(void)
 {
       free(drivers);
       drivers = NULL;
diff --git a/vvp/vpi_vthr_vector.cc b/vvp/vpi_vthr_vector.cc
index b57ef8b69..ebaf42dd2 100644
--- a/vvp/vpi_vthr_vector.cc
+++ b/vvp/vpi_vthr_vector.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2021 Stephen Williams (steve@icarus.com)
+ * Copyright (c) 2001-2024 Stephen Williams (steve@icarus.com)
  * Copyright (c) 2001 Stephan Boettcher <stephan@nevis.columbia.edu>
  *
  *    This source code is free software; you can redistribute it
@@ -218,7 +218,7 @@ void thread_word_delete(vpiHandle item)
 
 static void thread_word_delete_real(vpiHandle item)
 {
-      struct __vpiVThrWord*obj = dynamic_cast<__vpiVThrWord*>(item);
+      class __vpiVThrWord*obj = dynamic_cast<__vpiVThrWord*>(item);
       delete obj;
 }
 #endif