diff --git a/packages/backend-common/src/discovery/SingleHostDiscovery.ts b/packages/backend-common/src/discovery/SingleHostDiscovery.ts
index 1970583e5f..184746b924 100644
--- a/packages/backend-common/src/discovery/SingleHostDiscovery.ts
+++ b/packages/backend-common/src/discovery/SingleHostDiscovery.ts
@@ -49,7 +49,10 @@ export class SingleHostDiscovery implements PluginEndpointDiscovery {
     // Translate bind-all to localhost, and support IPv6
     let host = listenHost;
     if (host === '::') {
-      host = '::1';
+      // We use localhost instead of ::1, since IPv6-compatible systems should default
+      // to using IPv6 when they see localhost, but if the system doesn't support IPv6
+      // things will still work.
+      host = 'localhost';
     } else if (host === '0.0.0.0') {
       host = '127.0.0.1';
     }