diff --git a/linguistic/source/gciterator.cxx b/linguistic/source/gciterator.cxx
index 0f59515dcc15..b1dce0de8543 100644
--- a/linguistic/source/gciterator.cxx
+++ b/linguistic/source/gciterator.cxx
@@ -241,7 +241,7 @@ GrammarCheckingIterator::GrammarCheckingIterator() :
     m_aEventListeners( MyMutex::get() ),
     m_aNotifyListeners( MyMutex::get() )
 {
-    m_thread = osl_createThread( lcl_workerfunc, this );
+    m_thread = nullptr;
 }
 
 
@@ -321,6 +321,8 @@ void GrammarCheckingIterator::AddEntry(
 
         // add new entry to the end of this queue
         ::osl::Guard< ::osl::Mutex > aGuard( MyMutex::get() );
+        if (!m_thread)
+            m_thread = osl_createThread( lcl_workerfunc, this );
         m_aFPEntriesQueue.push_back( aNewFPEntry );
 
         // wake up the thread in order to do grammar checking