diff --git a/paris-traceroute-current/src/ConcurrentTracert.cc b/paris-traceroute-current/src/ConcurrentTracert.cc

index 2139983..8361885 100644

--- a/paris-traceroute-current/src/ConcurrentTracert.cc

+++ b/paris-traceroute-current/src/ConcurrentTracert.cc

@@ -27,7 +27,7 @@ ConcurrentTracert::~ConcurrentTracert () {

 bool

 ConcurrentTracert::trace () {

-	trace(opts->dst_addr, id_current, id_current+2000);

+	return trace(opts->dst_addr, id_current, id_current+2000);

 }

 bool

diff --git a/paris-traceroute-current/src/ExhaustiveOldTracert.cc b/paris-traceroute-current/src/ExhaustiveOldTracert.cc

index 7ff6202..14e329d 100644

--- a/paris-traceroute-current/src/ExhaustiveOldTracert.cc

+++ b/paris-traceroute-current/src/ExhaustiveOldTracert.cc

@@ -161,7 +161,7 @@ ExhaustiveOldTracert::ProbesToSend(int nbr_interfaces) {

 bool

 ExhaustiveOldTracert::trace () {

-	trace(opts->dst_addr, id_current, id_current + 2000);

+	return trace(opts->dst_addr, id_current, id_current + 2000);

 }

diff --git a/paris-traceroute-current/src/ExhaustiveTracert.cc b/paris-traceroute-current/src/ExhaustiveTracert.cc

index b7e8e2c..3e54586 100644

--- a/paris-traceroute-current/src/ExhaustiveTracert.cc

+++ b/paris-traceroute-current/src/ExhaustiveTracert.cc

@@ -86,7 +86,7 @@ ExhaustiveTracert::ProbesToSend(int nbr_interfaces) {

 bool

 ExhaustiveTracert::trace () {

-	trace(opts->dst_addr, id_current, 0/*XXX*/);

+	return trace(opts->dst_addr, id_current, 0/*XXX*/);

 }

 void 

diff --git a/paris-traceroute-current/src/HopByHopTracert.cc b/paris-traceroute-current/src/HopByHopTracert.cc

index 69d5b8b..5df9972 100644

--- a/paris-traceroute-current/src/HopByHopTracert.cc

+++ b/paris-traceroute-current/src/HopByHopTracert.cc

@@ -37,7 +37,7 @@ HopByHopTracert::~HopByHopTracert () {

 bool

 HopByHopTracert::trace () {

-	trace(opts->dst_addr, id_current, id_current+2000);

+	return trace(opts->dst_addr, id_current, id_current+2000);

 }

 /**

diff --git a/paris-traceroute-current/src/PackByPackTracert.cc b/paris-traceroute-current/src/PackByPackTracert.cc

index 7220798..cd17671 100644

--- a/paris-traceroute-current/src/PackByPackTracert.cc

+++ b/paris-traceroute-current/src/PackByPackTracert.cc

@@ -24,7 +24,7 @@ PackByPackTracert::~PackByPackTracert () {

 bool

 PackByPackTracert::trace () {

-	trace(opts->dst_addr, id_current, id_current+2000);

+	return trace(opts->dst_addr, id_current, id_current+2000);

 }

 bool

diff --git a/paris-traceroute-current/src/ScoutTracert.cc b/paris-traceroute-current/src/ScoutTracert.cc

index 51f8b71..de3a168 100644

--- a/paris-traceroute-current/src/ScoutTracert.cc

+++ b/paris-traceroute-current/src/ScoutTracert.cc

@@ -30,7 +30,7 @@ ScoutTracert::~ScoutTracert () {

 bool

 ScoutTracert::trace () {

-	trace(opts->dst_addr, id_current, id_current+2000);

+	return trace(opts->dst_addr, id_current, id_current+2000);

 }

 /**