diff --git a/lib/galaxy/config/sample/container_resolvers_conf.xml.sample b/lib/galaxy/config/sample/container_resolvers_conf.xml.sample
index ce59312b097..da515f684ff 100644
--- a/lib/galaxy/config/sample/container_resolvers_conf.xml.sample
+++ b/lib/galaxy/config/sample/container_resolvers_conf.xml.sample
@@ -3,6 +3,10 @@
   <!-- explicit: resolves container URI for a job through explict container
        tags in the tool XML wrapper. -->
 
+  <explicit_singularity />
+  <!-- explicit: resolves container URI for a job through explict container
+       tags in the tool XML wrapper. -->
+       
   <!-- All mulled flavors below work by default unless enable_mulled_containers is
        set to false in the galaxy.yaml config file. -->