diff --git a/modules/Bio/EnsEMBL/Utils/TranscriptAlleles.pm b/modules/Bio/EnsEMBL/Utils/TranscriptAlleles.pm
index 1ac958ce374d6c0dba993ac5569af05d7a895061..740411ace5bba656518192ead424855fba0fd4f0 100644
--- a/modules/Bio/EnsEMBL/Utils/TranscriptAlleles.pm
+++ b/modules/Bio/EnsEMBL/Utils/TranscriptAlleles.pm
@@ -329,7 +329,7 @@ sub type_variation {
 	
 	my $last_codon_length = length($cds) - ($codon_cds_start - 1);
 	
-	if($last_codon_length < 3 && $last_codon_length >= 0) {
+	if($last_codon_length < 3 && $last_codon_length > 0) {
 	  $var->type("PARTIAL_CODON");
 		
 	  # add the CDS coords