diff --git a/drawinglayer/source/primitive2d/textlayoutdevice.cxx b/drawinglayer/source/primitive2d/textlayoutdevice.cxx
index a7eb74947faa..22290230ec81 100644
--- a/drawinglayer/source/primitive2d/textlayoutdevice.cxx
+++ b/drawinglayer/source/primitive2d/textlayoutdevice.cxx
@@ -85,6 +85,7 @@ namespace
     ImpTimedRefDev::~ImpTimedRefDev()
     {
         OSL_ENSURE(0L == mnUseCount, "destruction of a still used ImpTimedRefDev (!)");
+        const SolarMutexGuard aSolarGuard;
         mpVirDev.disposeAndClear();
     }