2 files changed, 3 insertions, 2 deletions
diff --git a/sd/source/ui/slidesorter/cache/SlsQueueProcessor.cxx b/sd/source/ui/slidesorter/cache/SlsQueueProcessor.cxx
index 6a7772cd75de..d515d21cf580 100644
--- a/sd/source/ui/slidesorter/cache/SlsQueueProcessor.cxx
+++ b/sd/source/ui/slidesorter/cache/SlsQueueProcessor.cxx
@@ -145,7 +145,7 @@ void QueueProcessor::ProcessOneRequest (
 {
     try
     {
-        ::osl::MutexGuard aGuard (maMutex);
+        std::lock_guard aGuard (maMutex);
 
         // Create a new preview bitmap and store it in the cache.
         if (mpCache != nullptr && mpCacheContext)
diff --git a/sd/source/ui/slidesorter/cache/SlsQueueProcessor.hxx b/sd/source/ui/slidesorter/cache/SlsQueueProcessor.hxx
index f29d996c6fa8..0035bcbce7e1 100644
--- a/sd/source/ui/slidesorter/cache/SlsQueueProcessor.hxx
+++ b/sd/source/ui/slidesorter/cache/SlsQueueProcessor.hxx
@@ -24,6 +24,7 @@
 #include "SlsBitmapFactory.hxx"
 
 #include <vcl/timer.hxx>
+#include <mutex>
 
 namespace sd::slidesorter::cache {
 
@@ -74,7 +75,7 @@ private:
     /** This mutex is used to guard the queue processor.  Be careful not to
         mix its use with that of the solar mutex.
     */
-    ::osl::Mutex maMutex;
+    std::mutex maMutex;
 
     Timer  maTimer;
     DECL_LINK(ProcessRequestHdl, Timer *, void);