diff --git a/PVE/API2/Nodes.pm b/PVE/API2/Nodes.pm
index 36cb70b4..7feb5662 100644
--- a/PVE/API2/Nodes.pm
+++ b/PVE/API2/Nodes.pm
@@ -1187,12 +1187,6 @@ __PACKAGE__->register_method ({
 	properties => {
 	    node => get_standard_option('pve-node'),
 	    proxy => get_standard_option('spice-proxy', { optional => 1 }),
-	    upgrade => {
-		type => 'boolean',
-		description => "Deprecated, use the 'cmd' property instead! Run 'apt-get dist-upgrade' instead of normal shell.",
-		optional => 1,
-		default => 0,
-	    },
 	    cmd => {
 		type => 'string',
 		description => "Run specific command or default to login.",
@@ -1219,17 +1213,17 @@ __PACKAGE__->register_method ({
 	my ($user, undef, $realm) = PVE::AccessControl::verify_username($authuser);
 
 	raise_perm_exc("realm != pam") if $realm ne 'pam';
-	raise_perm_exc('user != root@pam') if $param->{upgrade} && $user ne 'root@pam';
+
+	if (defined($param->{cmd}) && $param->{cmd} eq 'upgrade' && $user ne 'root@pam') {
+	    raise_perm_exc('user != root@pam');
+	}
 
 	my $node = $param->{node};
 	my $proxy = $param->{proxy};
 
 	my $authpath = "/nodes/$node";
 	my $permissions = 'Sys.Console';
-	# FIXME: remove with 6.0
-	if ($param->{upgrade}) {
-	    $param->{cmd} = 'upgrade';
-	}
+
 	my $shcmd = get_shell_command($user, $param->{cmd}, $param->{'cmd-opts'});
 
 	my $title = "Shell on '$node'";