SERVER-39338 Remove `stdx/functional.h`

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mongo/util/queue.h b/src/mongo/util/queue.h
index 6cc79d5d47f..63321eeb926 100644
--- a/src/mongo/util/queue.h
+++ b/src/mongo/util/queue.h
@@ -30,12 +30,12 @@
 #pragma once
 
 #include <boost/optional.hpp>
+#include <functional>
 #include <limits>
 #include <queue>
 
 #include "mongo/stdx/chrono.h"
 #include "mongo/stdx/condition_variable.h"
-#include "mongo/stdx/functional.h"
 #include "mongo/stdx/mutex.h"
 
 namespace mongo {
@@ -54,7 +54,7 @@ class BlockingQueue {
     BlockingQueue& operator=(const BlockingQueue&) = delete;
 
 public:
-    using GetSizeFn = stdx::function<size_t(const T&)>;
+    using GetSizeFn = std::function<size_t(const T&)>;
 
     BlockingQueue() : BlockingQueue(std::numeric_limits<std::size_t>::max()) {}
     BlockingQueue(size_t size) : BlockingQueue(size, [](const T&) { return 1; }) {}