diff --git a/src/Prestage.cc b/src/Prestage.cc
index d70c51d..9744543 100644
--- a/src/Prestage.cc
+++ b/src/Prestage.cc
@@ -110,9 +110,11 @@ void PrestageRequestManager::PrestageQueue::PrestageWorker::Run() {
 void PrestageRequestManager::PrestageQueue::Done(PrestageWorker *worker) {
     std::unique_lock lock(m_mutex);
     m_done = true;
-    std::erase_if(m_workers, [&](std::unique_ptr<PrestageWorker> &other) {
-        return other.get() == worker;
-    });
+    auto it = std::remove_if(m_workers.begin(), m_workers.end(),
+                             [&](std::unique_ptr<PrestageWorker> &other) {
+                                 return other.get() == worker;
+                             });
+    m_workers.erase(it, m_workers.end());
 
     if (m_workers.empty()) {
         lock.unlock();
diff --git a/src/XrdHttpPelican.hh b/src/XrdHttpPelican.hh
index f8215b2..6b3b51b 100644
--- a/src/XrdHttpPelican.hh
+++ b/src/XrdHttpPelican.hh
@@ -18,6 +18,7 @@
 
 #include "private/XrdHttp/XrdHttpExtHandler.hh"
 
+#include <atomic>
 #include <chrono>
 #include <condition_variable>
 #include <deque>