diff --git a/mod-picker/app/assets/stylesheets/components/pluginMetadata.scss b/mod-picker/app/assets/stylesheets/components/pluginMetadata.scss
index a665274c1..609588b92 100644
--- a/mod-picker/app/assets/stylesheets/components/pluginMetadata.scss
+++ b/mod-picker/app/assets/stylesheets/components/pluginMetadata.scss
@@ -22,4 +22,9 @@ plugin-metadata {
     color: $success_secondary;
     border: 1px solid $success_secondary;
   }
+
+  .dummy-flag {
+    color: $error_secondary;
+    border: 1px solid $error_secondary;
+  }
 }
\ No newline at end of file
diff --git a/mod-picker/public/resources/directives/shared/pluginMetadata.html b/mod-picker/public/resources/directives/shared/pluginMetadata.html
index 08f0f103b..c47a9ad66 100644
--- a/mod-picker/public/resources/directives/shared/pluginMetadata.html
+++ b/mod-picker/public/resources/directives/shared/pluginMetadata.html
@@ -1,7 +1,8 @@
 <div class="stat-item">
     <dt class="stat-title">Filename</dt>
     <dd class="stat-data">{{plugin.filename}}
-        <span ng-if="plugin.is_esm" class="flag esm-flag">ESM</span>
+        <span ng-if="plugin.is_esm" class="flag esm-flag" title="This plugin has the ESM flag set to true in its file header.">ESM</span>
+        <span ng-if="plugin.used_dummy_plugins" class="flag dummy-flag" title="The user used a dummy master when analyzing this plugin.  Plugin error information may be incomplete.">DUMB</span>
     </dd>
 </div>