diff --git a/lib/Travelynx/Model/Journeys.pm b/lib/Travelynx/Model/Journeys.pm
index f23c2b1a446ee49aced96e3a7eab27e494296369..f577236764875f9b5d8b487274cb6590ebe98912 100755
--- a/lib/Travelynx/Model/Journeys.pm
+++ b/lib/Travelynx/Model/Journeys.pm
@@ -1088,7 +1088,7 @@ sub compute_review {
 
 		my %seen;
 
-		if ( $journey->{rt_duration} ) {
+		if ( $journey->{rt_duration} and $journey->{rt_duration} > 0 ) {
 			if ( not $longest_t
 				or $journey->{rt_duration} > $longest_t->{rt_duration} )
 			{
@@ -1163,7 +1163,7 @@ sub compute_review {
 			}
 		}
 
-		if ( $journey->{rt_duration} and $journey->{sched_duration} ) {
+		if ( $journey->{rt_duration} and $journey->{sched_duration} and $journey->{rt_duration} > 0 and $journey->{sched_duration} > 0 ) {
 			my $slowdown = $journey->{rt_duration} - $journey->{sched_duration};
 			my $speedup  = -$slowdown;
 			if (