diff --git a/tools/jbrowse2/macros.xml b/tools/jbrowse2/macros.xml
index cd107511d1..0c217cf04b 100644
--- a/tools/jbrowse2/macros.xml
+++ b/tools/jbrowse2/macros.xml
@@ -101,7 +101,7 @@
                     <option value="collect">Convert a collection of suitable track files</option>
                 </param>
                 <when value="collect">
-                    <param name="autoCollection" type="data_collection" label="Collection of bed, bam and other track files"/>
+                    <param name="autoCollection" type="data_collection" collection_type="list" label="Collection of bed, bam and other track files"/>
                 </when>
                 <when value="form"/>
             </conditional>