diff --git a/config/datatypes_conf.xml.sample b/config/datatypes_conf.xml.sample
index fcb9001003c..d092c7d6d0e 100644
--- a/config/datatypes_conf.xml.sample
+++ b/config/datatypes_conf.xml.sample
@@ -3,6 +3,7 @@
   <registration converters_path="lib/galaxy/datatypes/converters" display_path="display_applications">
     <datatype extension="ab1" type="galaxy.datatypes.binary:Ab1" mimetype="application/octet-stream" display_in_upload="true" description="A binary sequence file in 'ab1' format with a '.ab1' file extension.  You must manually select this 'File Format' when uploading the file." description_url="https://wiki.galaxyproject.org/Learn/Datatypes#Ab1"/>
     <datatype extension="afg" type="galaxy.datatypes.assembly:Amos" display_in_upload="false" />
+    <!--datatype extension="arff" type="galaxy.datatypes.text:Arff" mimetype="text/plain" display_in_upload="True"/-->
     <datatype extension="asn1" type="galaxy.datatypes.data:GenericAsn1" mimetype="text/plain" display_in_upload="true" />
     <datatype extension="asn1-binary" type="galaxy.datatypes.binary:GenericAsn1Binary" mimetype="application/octet-stream" display_in_upload="true" />
     <datatype extension="axt" type="galaxy.datatypes.sequence:Axt" display_in_upload="true" description="blastz pairwise alignment format.  Each alignment block in an axt file contains three lines: a summary line and 2 sequence lines.  Blocks are separated from one another by blank lines.  The summary line contains chromosomal position and size information about the alignment. It consists of 9 required fields." description_url="https://wiki.galaxyproject.org/Learn/Datatypes#Axt"/>
@@ -298,6 +299,7 @@
     <sniffer type="galaxy.datatypes.data:Newick"/>
     <sniffer type="galaxy.datatypes.data:Nexus"/>
     <sniffer type="galaxy.datatypes.text:Obo"/>
+    <!--sniffer type="galaxy.datatypes.text.Arff"/-->
     <sniffer type="galaxy.datatypes.text:Ipynb"/>
     <sniffer type="galaxy.datatypes.text:Json"/>
     <sniffer type="galaxy.datatypes.images:Jpg"/>