Use std::lock_guard instead of std::unique_lock.

1 files changed, 1 insertions, 1 deletions

diff --git a/searchlib/src/tests/postinglistbm/andstress.cpp b/searchlib/src/tests/postinglistbm/andstress.cpp
index 736d53508b4..40f919509e8 100644
--- a/searchlib/src/tests/postinglistbm/andstress.cpp
+++ b/searchlib/src/tests/postinglistbm/andstress.cpp
@@ -280,7 +280,7 @@ AndStressMaster::Task *
 AndStressMaster::getTask()
 {
     Task *result = NULL;
-    std::unique_lock<std::mutex> taskGuard(_taskLock);
+    std::lock_guard<std::mutex> taskGuard(_taskLock);
     if (_taskIdx < _tasks.size()) {
         result = &_tasks[_taskIdx];
         ++_taskIdx;