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-rw-r--r--svl/source/undo/undo.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/svl/source/undo/undo.cxx b/svl/source/undo/undo.cxx
index 7ac42cc95800..6c1f46ede48c 100644
--- a/svl/source/undo/undo.cxx
+++ b/svl/source/undo/undo.cxx
@@ -20,6 +20,7 @@
#include <com/sun/star/uno/Exception.hpp>
+#include <osl/mutex.hxx>
#include <comphelper/flagguard.hxx>
#include <tools/debug.hxx>
#include <tools/diagnose_ex.h>