diff --git a/Changes b/Changes
index 234d1ba..357a5b5 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,10 @@
 Revision history for Perl extension NetAddr::IP
 
+4.052 Tue Oct 25 16:18:38 PDT 2011
+        add test in Lite.pm v1.35 for api-version of Math::BigInt to 
+	support versions earlier than 1.70, circa Dec 2003. 
+        Thanks to Paul Howarth <paul@city-fan.org> for spotting that bug.
+
 4.051 Mon Oct 24 14:44:53 PDT 2011
 	fix bug 71869
 	in Lite.pm v1.34
diff --git a/IP.pm b/IP.pm
index 702b1ad..ae3a8bf 100644
--- a/IP.pm
+++ b/IP.pm
@@ -35,7 +35,7 @@
 
 @ISA = qw(Exporter NetAddr::IP::Lite);
 
-$VERSION = do { sprintf " %d.%03d", (q$Revision: 4.51 $ =~ /\d+/g) };
+$VERSION = do { sprintf " %d.%03d", (q$Revision: 4.52 $ =~ /\d+/g) };
 
 =pod
 
diff --git a/Lite/Changes b/Lite/Changes
index 76b01e3..148b232 100644
--- a/Lite/Changes
+++ b/Lite/Changes
@@ -1,8 +1,14 @@
 Revision history for Perl extension NetAddr::IP::Lite
 
+1.35  Tue Oct 25 16:18:38 PDT 2011
+	add test for api-version of Math::BigInt to support versions 
+	earlier than 1.70, circa Dec 2003. 
+	Thanks to Paul Howarth <paul@city-fan.org> for spotting that bug.
+
 1.34  Mon Oct 24 14:38:16 PDT 2011
 	use Math::BigInt::Calc for creating BigInt values and fall
 	back to NetAddr::IP::Calc if Math::BigInt is not present.
+	Thanks to Paul Howarth <paul@city-fan.org> for spotting that bug.
 
         remove reference to Config{osname} in InetBase.pm v0.03
 	(Util 1.43)
diff --git a/Lite/Lite.pm b/Lite/Lite.pm
index f0f31e6..2ba073e 100644
--- a/Lite/Lite.pm
+++ b/Lite/Lite.pm
@@ -32,7 +32,7 @@
 
 use vars qw(@ISA @EXPORT_OK $VERSION $Accept_Binary_IP $Old_nth $AUTOLOAD *Zero);
 
-$VERSION = do { my @r = (q$Revision: 1.34 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r };
+$VERSION = do { my @r = (q$Revision: 1.35 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r };
 
 require Exporter;
 
@@ -1181,21 +1181,28 @@
 =cut
 
 my $biloaded;
+my $biapi;
 
 sub _biValue {
   unless ($biloaded) {
     if (eval {require Math::BigInt::Calc}) {
       $biloaded = \&Math::BigInt::Calc::_new;
+      $biapi = eval {Math::BigInt::Calc::api_version()};
     } else {
       require NetAddr::IP::Calc;
       $biloaded = \&NetAddr::IP::Calc::_new;
+      $biapi = 1;
     }
   }
-  my $bi = {
+
+  my $biarray = $biapi
+	? $biloaded->(undef,$_[0])
+	: $biloaded->(undef,\$_[0]);	# versions before 1.70 expect a reference
+
+  bless {
 	sign	=> '+',
-	value	=> $biloaded->(undef,$_[0]),
-  };
-  bless $bi, 'Math::BigInt';
+	value	=> $biarray,
+  }, 'Math::BigInt';
 }
 
 sub bigint($) {
diff --git a/META.yml b/META.yml
index fd06cc8..a03c3c6 100644
--- a/META.yml
+++ b/META.yml
@@ -1,6 +1,6 @@
 --- #YAML:1.0
 name:                NetAddr-IP
-version:             4.051
+version:             4.052
 abstract:            Manages IPv4 and IPv6 addresses and subnets
 license:             ~
 author: