diff --git a/modules/bowtie2/align/main.nf b/modules/bowtie2/align/main.nf
index b7334614..6d65aa50 100644
--- a/modules/bowtie2/align/main.nf
+++ b/modules/bowtie2/align/main.nf
@@ -42,7 +42,7 @@ process BOWTIE2_ALIGN {
     """
     INDEX=`find -L ./ -name "*.rev.1.bt2" | sed "s/.rev.1.bt2//"`
     [ -z "\$INDEX" ] && INDEX=`find -L ./ -name "*.rev.1.bt2l" | sed "s/.rev.1.bt2l//"`
-    [ -z "\$INDEX" ] && echo "BT2 index files not found" 1>&2 && exit 1
+    [ -z "\$INDEX" ] && echo "Bowtie2 index files not found" 1>&2 && exit 1
 
     bowtie2 \\
         -x \$INDEX \\