diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/account/ExternalIdCacheImpl.java b/gerrit-server/src/main/java/com/google/gerrit/server/account/ExternalIdCacheImpl.java
index 8585ffd6ad..e55b15a1fe 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/account/ExternalIdCacheImpl.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/account/ExternalIdCacheImpl.java
@@ -160,7 +160,7 @@ public class ExternalIdCacheImpl implements ExternalIdCache {
     }
   }
 
-  static class AllKey {
+  public static class AllKey {
     static final AllKey ALL = new AllKey();
 
     private AllKey() {