diff --git a/plugins/network/tor-bandwidth-usage b/plugins/network/tor-bandwidth-usage
index 316d57ca..b1871ade 100755
--- a/plugins/network/tor-bandwidth-usage
+++ b/plugins/network/tor-bandwidth-usage
@@ -60,9 +60,13 @@ sub Authenticate
         if (open(COOKIE, "<$ENV{cookiefile}")) {
             my $cookie;
             binmode COOKIE;
-            read(COOKIE, $cookie, 32);
+            $authline .= " ";
+            while (read(COOKIE, $cookie, 32)) {
+                foreach my $byte (unpack "C*", $cookie) {
+                    $authline .= sprintf "%02x", $byte;
+                }
+            }
             close COOKIE;
-            $authline .= ' "' . $cookie . '"';
         }
     } elsif (defined($ENV{password})) {
         $authline .= ' "' . $ENV{password} . '"';