diff --git a/trio_whole_exome_create_parameter_files.pl b/trio_whole_exome_create_parameter_files.pl
index 2092253ab78556c8ebb30ebdd14982ec51f595cc..c7b3434c60e24f4b2e132d1798c38520eed1bd37 100644
--- a/trio_whole_exome_create_parameter_files.pl
+++ b/trio_whole_exome_create_parameter_files.pl
@@ -53,6 +53,7 @@ my %family;
 while (my $line = <>)
 {
 	next if ($line =~ /^File/);
+	next if ($line =~ /unassigned/);
 	chomp $line;
 
 	my @tokens = split(/\t/, $line);