diff --git a/lib/galaxy/config/sample/datatypes_conf.xml.sample b/lib/galaxy/config/sample/datatypes_conf.xml.sample
index 9671cbf2766c..6d757aee96cf 100644
--- a/lib/galaxy/config/sample/datatypes_conf.xml.sample
+++ b/lib/galaxy/config/sample/datatypes_conf.xml.sample
@@ -164,6 +164,7 @@
     <datatype extension="genetrack" type="galaxy.datatypes.tracks:GeneTrack">
       <!-- <display file="genetrack.xml" /> -->
     </datatype>
+    <datatype extension="a3m" type="galaxy.datatypes.sequence:Fasta" subclass="true" display_in_upload="true"/>
     <datatype extension="gff" type="galaxy.datatypes.interval:Gff" display_in_upload="true" description="GFF lines have nine required fields that must be tab-separated." description_url="https://wiki.galaxyproject.org/Learn/Datatypes#GFF">
       <converter file="gff_to_bed_converter.xml" target_datatype="bed"/>
       <converter file="gff_to_interval_index_converter.xml" target_datatype="interval_index"/>