diff --git a/drawinglayer/source/primitive2d/textlayoutdevice.cxx b/drawinglayer/source/primitive2d/textlayoutdevice.cxx
index abe3325d76be..409f225403b5 100644
--- a/drawinglayer/source/primitive2d/textlayoutdevice.cxx
+++ b/drawinglayer/source/primitive2d/textlayoutdevice.cxx
@@ -79,6 +79,7 @@ namespace
     ImpTimedRefDev::~ImpTimedRefDev()
     {
         OSL_ENSURE(0L == mnUseCount, "destruction of a still used ImpTimedRefDev (!)");
+        const SolarMutexGuard aGuard;
         delete mpVirDev;
     }