diff --git a/src/PVE/Tools.pm b/src/PVE/Tools.pm
index 0e1af09..0c6e532 100644
--- a/src/PVE/Tools.pm
+++ b/src/PVE/Tools.pm
@@ -660,7 +660,7 @@ sub wait_for_vnc_port {
 }
 
 sub next_unused_port {
-    my ($range_start, $range_end) = @_;
+    my ($range_start, $range_end, $family) = @_;
 
     # We use a file to register allocated ports.
     # Those registrations expires after $expiretime.
@@ -693,9 +693,9 @@ sub next_unused_port {
 	    next if $ports->{$p}; # reserved
 
 	    my $sock = IO::Socket::IP->new(Listen => 5,
-					   LocalAddr => '0.0.0.0',
 					   LocalPort => $p,
 					   ReuseAddr => 1,
+					   Family    => $family,
 					   Proto     => 0);
 
 	    if ($sock) {
@@ -725,15 +725,18 @@ sub next_unused_port {
 }
 
 sub next_migrate_port {
-    return next_unused_port(60000, 60050);
+    my ($family) = @_;
+    return next_unused_port(60000, 60050, $family);
 }
 
 sub next_vnc_port {
-    return next_unused_port(5900, 6000);
+    my ($family) = @_;
+    return next_unused_port(5900, 6000, $family);
 }
 
 sub next_spice_port {
-    return next_unused_port(61000, 61099);
+    my ($family) = @_;
+    return next_unused_port(61000, 61099, $family);
 }
 
 # NOTE: NFS syscall can't be interrupted, so alarm does