diff --git a/plugins/cffadaptor/src/UBCFFAdaptor.cpp b/plugins/cffadaptor/src/UBCFFAdaptor.cpp
index 6de92d92..af8b4f1b 100644
--- a/plugins/cffadaptor/src/UBCFFAdaptor.cpp
+++ b/plugins/cffadaptor/src/UBCFFAdaptor.cpp
@@ -1876,6 +1876,8 @@ UBCFFAdaptor::UBToCFFConverter::~UBToCFFConverter()
         delete mDataModel;
     if (mIWBContentWriter)
         delete mIWBContentWriter;
+    if (mDocumentToWrite)
+        delete mDocumentToWrite;
 }
 bool UBCFFAdaptor::UBToCFFConverter::isValid() const
 {