diff --git a/config/datatypes_conf.xml.sample b/config/datatypes_conf.xml.sample
index db44f9072dd..8761343acb5 100644
--- a/config/datatypes_conf.xml.sample
+++ b/config/datatypes_conf.xml.sample
@@ -198,7 +198,7 @@
       <converter file="encodepeak_to_bgzip_converter.xml" target_datatype="bgzip"/>
       <converter file="bed_gff_or_vcf_to_bigwig_converter.xml" target_datatype="bigwig"/>
     </datatype>
-    <datatype extension="pdf" type="galaxy.datatypes.images:Pdf" mimetype="application/pdf"/>
+    <datatype extension="pdf" type="galaxy.datatypes.images:Pdf" mimetype="application/pdf" display_in_upload="true"/>
     <datatype extension="pileup" type="galaxy.datatypes.tabular:Pileup" display_in_upload="true">
       <converter file="interval_to_bgzip_converter.xml" target_datatype="bgzip"/>
       <converter file="interval_to_tabix_converter.xml" target_datatype="tabix" depends_on="bgzip"/>