diff --git a/svl/source/items/itemset.cxx b/svl/source/items/itemset.cxx
index e967089e17ee..0be3d7105525 100644
--- a/svl/source/items/itemset.cxx
+++ b/svl/source/items/itemset.cxx
@@ -94,6 +94,12 @@ SfxItemSet::SfxItemSet(SfxItemPool& rPool)
 {
     m_pWhichRanges = const_cast<sal_uInt16*>(m_pPool->GetFrozenIdRanges());
     assert( m_pWhichRanges && "don't create ItemSets with full range before FreezeIdRanges()" );
+    if (!m_pWhichRanges)
+    {
+        std::unique_ptr<sal_uInt16[]> tmp;
+        m_pPool->FillItemIdRanges_Impl(tmp);
+        m_pWhichRanges = tmp.release();
+    }
 
     const sal_uInt16 nSize = TotalCount();
     m_pItems.reset(new const SfxPoolItem*[nSize]{});