diff --git a/fdbserver/ClusterController.actor.cpp b/fdbserver/ClusterController.actor.cpp
index d6a7b5d9d2..1456319a3f 100644
--- a/fdbserver/ClusterController.actor.cpp
+++ b/fdbserver/ClusterController.actor.cpp
@@ -926,7 +926,7 @@ public:
 			}
 		}
 
-		ASSERT(resultSet.size() <= desired);
+		ASSERT(resultSet.size() >= required && resultSet.size() <= desired);
 
 		for (auto& result : resultSet) {
 			id_used[result.interf.locality.processId()]++;