diff --git a/modules/Bio/EnsEMBL/Exon.pm b/modules/Bio/EnsEMBL/Exon.pm
index e60ca65b9b51c263f5821a75990302ad5ed2dc28..81531be2adb1b1aa132b3a1671c2994df5d1c84b 100755
--- a/modules/Bio/EnsEMBL/Exon.pm
+++ b/modules/Bio/EnsEMBL/Exon.pm
@@ -413,7 +413,7 @@ sub cdna_start {
     $cdna_start = $coords[0]->start();
   }
   elsif(@coords) {
-    throw "Last part of exon maps into gap";
+    throw "First part of exon maps into gap";
   }
   else {
     throw "Can not map exon";