diff --git a/nodist/invoke_vcs b/nodist/invoke_vcs
index 9bec7cb40..0f85ddd01 100755
--- a/nodist/invoke_vcs
+++ b/nodist/invoke_vcs
@@ -8,7 +8,7 @@ use strict;
 #======================================================================
 # main
 
-eval `modulecmd perl add synopsys-vcs_mx`;
+eval `modulecmd perl add synopsys-sim`;
 exec('vcs',@ARGV);
 
 #######################################################################
diff --git a/test_regress/driver.pl b/test_regress/driver.pl
index 48da14e52..358aaa227 100755
--- a/test_regress/driver.pl
+++ b/test_regress/driver.pl
@@ -369,7 +369,7 @@ sub new {
 	iv_run_flags => [],
 	# VCS
 	vcs => 0,
-	vcs_flags => [split(/\s+/,"+vcs+lic+wait +cli -I +define+VCS+1 -q -sverilog -CFLAGS '-DVCS' ")],
+	vcs_flags => [split(/\s+/,"+vcs+lic+wait +cli -debug_access +define+VCS+1 -q -sverilog -CFLAGS '-DVCS' ")],
 	vcs_flags2 => [],  # Overridden in some sim files
 	vcs_run_flags => [split(/\s+/,"+vcs+lic_wait")],
 	# NC