1 files changed, 2 insertions, 2 deletions
diff --git a/src/mongo/db/index/index_build_interceptor.cpp b/src/mongo/db/index/index_build_interceptor.cpp
index ace415aa6dd..a965feb4c60 100644
--- a/src/mongo/db/index/index_build_interceptor.cpp
+++ b/src/mongo/db/index/index_build_interceptor.cpp
@@ -377,7 +377,7 @@ bool IndexBuildInterceptor::areAllWritesApplied(OperationContext* opCtx) const {
 }
 
 boost::optional<MultikeyPaths> IndexBuildInterceptor::getMultikeyPaths() const {
-    stdx::unique_lock<stdx::mutex> lk(_multikeyPathMutex);
+    stdx::unique_lock<Latch> lk(_multikeyPathMutex);
     return _multikeyPaths;
 }
 
@@ -403,7 +403,7 @@ Status IndexBuildInterceptor::sideWrite(OperationContext* opCtx,
         // SERVER-39705: It's worth noting that a document may not generate any keys, but be
         // described as being multikey. This step must be done to maintain parity with `validate`s
         // expectations.
-        stdx::unique_lock<stdx::mutex> lk(_multikeyPathMutex);
+        stdx::unique_lock<Latch> lk(_multikeyPathMutex);
         if (_multikeyPaths) {
             MultikeyPathTracker::mergeMultikeyPaths(&_multikeyPaths.get(), multikeyPaths);
         } else {