diff --git a/demo/custom.js b/demo/custom.js
index ffd3b9612c..dc95880307 100644
--- a/demo/custom.js
+++ b/demo/custom.js
@@ -407,14 +407,14 @@ shakaDemo.Custom = class {
       const licenseServerURL = licenseServerUrlInput.value;
       const customDRMSystem = customDrmSystemInput.value;
       if (licenseServerURL) {
-        // Make a license server entry for every common DRM plugin.
         assetInProgress.licenseServers.clear();
-        for (const drmSystem of shakaDemo.Main.commonDrmSystems) {
-          assetInProgress.licenseServers.set(drmSystem, licenseServerURL);
-        }
         if (customDRMSystem) {
-          // Make a custom entry too.
           assetInProgress.licenseServers.set(customDRMSystem, licenseServerURL);
+        } else {
+          // Make a license server entry for every common DRM plugin.
+          for (const drmSystem of shakaDemo.Main.commonDrmSystems) {
+            assetInProgress.licenseServers.set(drmSystem, licenseServerURL);
+          }
         }
       } else {
         assetInProgress.licenseServers.clear();