--- a/bin/asstatd.pl	2017-02-26 12:08:49.740322120 +0200
+++ b/bin/asstatd.pl	2017-02-28 19:06:26.686928982 +0200
@@ -12,6 +12,7 @@ use IO::Socket;
 use RRDs;
 use Getopt::Std;
 use Scalar::Util qw(looks_like_number);
+use Math::Int64 qw( string_to_int64 );
 
 my %knownlinks;
 my %link_samplingrates;
@@ -318,7 +319,7 @@ sub parse_netflow_v9_data_flowset {
 				if ($cur_fldlen == 4) {
 					$inoctets = unpack("N", $cur_fldval);
 				} elsif ($cur_fldlen == 8) {
-					$inoctets = unpack("Q>", $cur_fldval);
+					$inoctets = unpack("A8>", string_to_int64($cur_fldval,2));
 				}
 			} elsif ($cur_fldtype == 23) {	# OUT_BYTES
 				if ($cur_fldlen == 4) {