1 files changed, 2 insertions, 1 deletions
diff --git a/java/com/google/gerrit/json/OutputFormat.java b/java/com/google/gerrit/json/OutputFormat.java
index a2d174f4cc..3e7c319aa7 100644
--- a/java/com/google/gerrit/json/OutputFormat.java
+++ b/java/com/google/gerrit/json/OutputFormat.java
@@ -55,7 +55,8 @@ public enum OutputFormat {
     GsonBuilder gb =
         new GsonBuilder()
             .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
-            .registerTypeAdapter(Timestamp.class, new SqlTimestampDeserializer());
+            .registerTypeAdapter(Timestamp.class, new SqlTimestampDeserializer())
+            .registerTypeAdapterFactory(new EnumTypeAdapterFactory());
     if (this == OutputFormat.JSON) {
       gb.setPrettyPrinting();
     }