diff --git a/PVE/VZDump/QemuServer.pm b/PVE/VZDump/QemuServer.pm
index 6f0656fe..012c9210 100644
--- a/PVE/VZDump/QemuServer.pm
+++ b/PVE/VZDump/QemuServer.pm
@@ -90,10 +90,6 @@ sub prepare {
 	if (!$volume->{included}) {
 	    $self->loginfo("exclude disk '$name' '$volid' ($volume->{reason})");
 	    next;
-	} elsif ($self->{vm_was_running} && $volume_config->{iothread} &&
-		 !PVE::QemuServer::Machine::runs_at_least_qemu_version($vmid, 4, 0, 1)) {
-	    die "disk '$name' '$volid' (iothread=on) can't use backup feature with running QEMU " .
-		"version < 4.0.1! Either set backup=no for this drive or upgrade QEMU and restart VM\n";
 	} else {
 	    my $log = "include disk '$name' '$volid'";
 	    if (defined(my $size = $volume_config->{size})) {