diff --git a/datatypes_conf.xml.sample b/datatypes_conf.xml.sample
index 33b4ec68755..4082f2ed7e7 100644
--- a/datatypes_conf.xml.sample
+++ b/datatypes_conf.xml.sample
@@ -189,7 +189,7 @@
       <display file="igv/vcf.xml" />
       <display file="rviewer/vcf.xml" inherit="True"/>
     </datatype>
-    <datatype extension="bcf" type="galaxy.datatypes.binary:Binary" subclass="True" display_in_upload="True"/>
+    <datatype extension="bcf" type="galaxy.datatypes.binary:Bcf" mimetype="application/octet-stream" display_in_upload="True"/>
     <datatype extension="velvet" type="galaxy.datatypes.assembly:Velvet" display_in_upload="false"/>
     <datatype extension="wig" type="galaxy.datatypes.interval:Wiggle" display_in_upload="true" description="The wiggle format is line-oriented.  Wiggle data is preceded by a track definition line, which adds a number of options for controlling the default display of this track." description_url="https://wiki.galaxyproject.org/Learn/Datatypes#Wig">
       <converter file="wig_to_bigwig_converter.xml" target_datatype="bigwig"/>