diff --git a/src/main/java/com/cloudbees/jenkins/plugins/customtools/CustomTool.java b/src/main/java/com/cloudbees/jenkins/plugins/customtools/CustomTool.java
index 67b7af0..561abb2 100644
--- a/src/main/java/com/cloudbees/jenkins/plugins/customtools/CustomTool.java
+++ b/src/main/java/com/cloudbees/jenkins/plugins/customtools/CustomTool.java
@@ -53,6 +53,7 @@
 import jenkins.MasterToSlaveFileCallable;
 import jenkins.plugins.customtools.util.envvars.VariablesSubstitutionHelper;
 
+import org.jenkinsci.Symbol;
 import org.kohsuke.accmod.Restricted;
 import org.kohsuke.accmod.restrictions.NoExternalUse;
 import org.kohsuke.stapler.DataBoundConstructor;
@@ -211,6 +212,7 @@ public void check() throws CustomToolException {
     }
 
     @Extension
+    @Symbol("custom")
     public static class DescriptorImpl extends ToolDescriptor<CustomTool> {
 
         public DescriptorImpl() {