diff --git a/include/openpose/thread/threadManager.hpp b/include/openpose/thread/threadManager.hpp
index b765cbcf..f899e7d4 100644
--- a/include/openpose/thread/threadManager.hpp
+++ b/include/openpose/thread/threadManager.hpp
@@ -464,7 +464,7 @@ namespace op
                     maxQueueId = fastMax(maxQueueId, fastMax(std::get<2>(threadWorkerQueue), std::get<3>(threadWorkerQueue)));
 
                 // Check each queue id has at least a worker that uses it as input and another one as output. Special cases:
-                std::vector<std::pair<bool, bool>> usedQueueIds(maxQueueId, {false, false});
+                std::vector<std::pair<bool, bool>> usedQueueIds(maxQueueId + 1, {false, false});
                 for (const auto& threadWorkerQueue : mThreadWorkerQueues)
                 {
                     usedQueueIds[std::get<2>(threadWorkerQueue)].first = true;