diff --git a/mtr-0.71-underflow.patch b/mtr-0.71-underflow.patch
new file mode 100644
index 0000000..d427e21
--- /dev/null
+++ b/mtr-0.71-underflow.patch
@@ -0,0 +1,14 @@
+--- mtr-0.71/net.c.fix	2006-03-24 07:37:17.000000000 +0100
++++ mtr-0.71/net.c	2006-05-30 08:52:50.000000000 +0200
+@@ -354,8 +354,9 @@
+ 
+   totusec = (now.tv_sec  - sequence[seq].time.tv_sec ) * 1000000 +
+             (now.tv_usec - sequence[seq].time.tv_usec);
+-  /* impossible? if( totusec < 0 ) totusec = 0 */;
+-
++  /* sometimes < 0 */
++  totusec = abs(totusec);
++  
+   if ( addrcmp( (void *) &(host[index].addr),
+ 		(void *) &unspec_addr, af ) == 0 ) {
+     // should be out of if as addr can change
diff --git a/mtr.spec b/mtr.spec
index 8cdd4ee..376c005 100644
--- a/mtr.spec
+++ b/mtr.spec
@@ -1,7 +1,7 @@
 Summary: A network diagnostic tool.
 Name: mtr
 Version: 0.71
-Release: 1
+Release: 2
 Epoch:	2
 Group: Applications/Internet
 License: GPL
@@ -11,6 +11,7 @@ Source1: xmtr.consolehelper
 Source2: xmtr.pam
 Patch1:	mtr-0.69-CVE-2002-0497.patch
 Patch2:	mtr-0.69-format.patch
+Patch3: mtr-0.71-underflow.patch
 BuildRequires: ncurses-devel gtk2-devel
 
 Buildroot: %{_tmppath}/%{name}-%{version}-root
@@ -35,6 +36,7 @@ diagnostic tool.
 %setup -q
 %patch1 -p1 -b .CVE-2002-0497
 %patch2 -p1 -b .format
+%patch3 -p1 -b .underflow
 
 %build
 %configure --enable-gtk2
@@ -91,6 +93,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_datadir}/pixmaps/mtr_icon.xpm
 
 %changelog
+* Tue May 30 2006 Marcela Maslanova <mmaslano@redhat.com> - 2:0.71-2
+- underflow solved
+
 * Fri Mar 24 2006 Miroslav Lichvar <mlichvar@redhat.com> - 2:0.71-1
 - update to mtr-0.71