diff --git a/config/datatypes_conf.xml.sample b/config/datatypes_conf.xml.sample
index 65fb94c91ad..6582e3b0d05 100644
--- a/config/datatypes_conf.xml.sample
+++ b/config/datatypes_conf.xml.sample
@@ -58,7 +58,7 @@
     <datatype extension="bowtie_base_index" type="galaxy.datatypes.ngsindex:BowtieBaseIndex" mimetype="text/html" display_in_upload="False"/>
     <datatype extension="csfasta" type="galaxy.datatypes.sequence:csFasta" display_in_upload="true"/>
     <datatype extension="data" type="galaxy.datatypes.data:Data" mimetype="application/octet-stream" max_optional_metadata_filesize="1048576" />
-    <datatype extension="data_manager_json" type="galaxy.datatypes.data:Text" mimetype="application/json" subclass="True" display_in_upload="False"/>
+    <datatype extension="data_manager_json" type="galaxy.datatypes.text:Json" mimetype="application/json" subclass="True" display_in_upload="False"/>
     <datatype extension="fasta" type="galaxy.datatypes.sequence:Fasta" display_in_upload="true" description="A sequence in FASTA format consists of a single-line description, followed by lines of sequence data. The first character of the description line is a greater-than ('>') symbol in the first column. All lines should be shorter than 80 characters." description_url="https://wiki.galaxyproject.org/Learn/Datatypes#Fasta">
       <converter file="fasta_to_tabular_converter.xml" target_datatype="tabular"/>
       <converter file="fasta_to_bowtie_base_index_converter.xml" target_datatype="bowtie_base_index"/>