2 files changed, 5 insertions, 3 deletions
diff --git a/tests/benchmarks/corelib/thread/qmutex/CMakeLists.txt b/tests/benchmarks/corelib/thread/qmutex/CMakeLists.txt
index 8872a50227..923bfba117 100644
--- a/tests/benchmarks/corelib/thread/qmutex/CMakeLists.txt
+++ b/tests/benchmarks/corelib/thread/qmutex/CMakeLists.txt
@@ -8,6 +8,7 @@ qt_internal_add_benchmark(tst_bench_qmutex
     SOURCES
         tst_qmutex.cpp
     PUBLIC_LIBRARIES
+        Qt::CorePrivate
         Qt::Test
 )
 
diff --git a/tests/benchmarks/corelib/thread/qmutex/tst_qmutex.cpp b/tests/benchmarks/corelib/thread/qmutex/tst_qmutex.cpp
index 9cea995433..9b14cbca5d 100644
--- a/tests/benchmarks/corelib/thread/qmutex/tst_qmutex.cpp
+++ b/tests/benchmarks/corelib/thread/qmutex/tst_qmutex.cpp
@@ -28,6 +28,7 @@
 
 #include <QtCore/QtCore>
 #include <QTest>
+#include <QtCore/private/qvolatile_p.h>
 
 #include <math.h>
 
@@ -158,7 +159,7 @@ void tst_QMutex::noThread()
             QBENCHMARK {
                 count = 0;
                 for (int i = 0; i < N; i++) {
-                    count++;
+                    QtPrivate::volatilePreIncrement(count);
                 }
             }
             break;
@@ -167,7 +168,7 @@ void tst_QMutex::noThread()
                 count = 0;
                 for (int i = 0; i < N; i++) {
                     mtx.lock();
-                    count++;
+                    QtPrivate::volatilePreIncrement(count);
                     mtx.unlock();
                 }
             }
@@ -177,7 +178,7 @@ void tst_QMutex::noThread()
                 count = 0;
                 for (int i = 0; i < N; i++) {
                     QMutexLocker locker(&mtx);
-                    count++;
+                    QtPrivate::volatilePreIncrement(count);
                 }
             }
             break;