diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/PushResultProcessing.java b/src/main/java/com/googlesource/gerrit/plugins/replication/PushResultProcessing.java
index 39d361f..8542034 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/PushResultProcessing.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/PushResultProcessing.java
@@ -127,7 +127,7 @@
           break;
       }
       sb.append(" (");
-      sb.append(refStatus.toString());
+      sb.append(refStatus == null ? "unknown" : refStatus.toString());
       sb.append(")");
       writeStdOut(sb.toString());
     }