diff --git a/man/mosh.1 b/man/mosh.1
index 1e6a6a2..8838c61 100644
--- a/man/mosh.1
+++ b/man/mosh.1
@@ -123,7 +123,8 @@ Synonym for \-\-predict=never
 .TP
 .B --family=\fIFAMILY\fP
 Force the use of a particular address family, which defaults to `inet'
-(IPv4), and can also be `inet6' (IPv6; requires IO::Socket::IP).
+(IPv4), and can also be `inet6' (IPv6; requires IO::Socket::IP or
+IO::Socket::INET6).
 
 .TP
 .B -4
diff --git a/scripts/mosh.pl b/scripts/mosh.pl
index 6a3aea6..8c19138 100755
--- a/scripts/mosh.pl
+++ b/scripts/mosh.pl
@@ -172,7 +172,10 @@ if ( not defined $bind_ip or $bind_ip =~ m{^ssh$}i ) {
 
 if ( defined $fake_proxy ) {
   use Errno qw(EINTR);
-  BEGIN { eval { require IO::Socket::IP; IO::Socket::IP->import('-register'); }; }
+  BEGIN {
+    eval { require IO::Socket::IP; IO::Socket::IP->import('-register'); 1 } or
+      eval { require IO::Socket::INET6 };
+  }
   use POSIX qw(_exit);
 
   my ( $host, $port ) = @ARGV;