diff --git a/src/widgets/itemviews/qheaderview.cpp b/src/widgets/itemviews/qheaderview.cpp
index 4975e72260..e82cd477c5 100644
--- a/src/widgets/itemviews/qheaderview.cpp
+++ b/src/widgets/itemviews/qheaderview.cpp
@@ -3339,8 +3339,7 @@ void QHeaderViewPrivate::setDefaultSectionSize(int size)
     defaultSectionSize = size;
     for (int i = 0; i < sectionSpans.count(); ++i) {
         QHeaderViewPrivate::SectionSpan &span = sectionSpans[i];
-        if (span.size > 0) {
-            //we resize it if it is not hidden (ie size > 0)
+        if (sectionHidden.isEmpty() || !sectionHidden.testBit(i)) { // resize on not hidden.
             const int newSize = size;
             if (newSize != span.size) {
                 length += newSize - span.size; //the whole length is changed
diff --git a/tests/auto/widgets/itemviews/qheaderview/tst_qheaderview.cpp b/tests/auto/widgets/itemviews/qheaderview/tst_qheaderview.cpp
index 9ad71771c5..1158a9f06b 100644
--- a/tests/auto/widgets/itemviews/qheaderview/tst_qheaderview.cpp
+++ b/tests/auto/widgets/itemviews/qheaderview/tst_qheaderview.cpp
@@ -170,6 +170,7 @@ private slots:
     void moveSectionAndReset();
     void moveSectionAndRemove();
     void saveRestore();
+    void defaultSectionSizeTest();
 
     void defaultAlignment_data();
     void defaultAlignment();
@@ -1625,6 +1626,32 @@ void tst_QHeaderView::saveRestore()
     QVERIFY(s1 == s2);
 }
 
+void tst_QHeaderView::defaultSectionSizeTest()
+{
+    // Setup
+    QTableView qtv;
+    QStandardItemModel amodel(4, 4);
+    qtv.setModel(&amodel);
+    QHeaderView *hv = qtv.verticalHeader();
+    const int defaultSize = 26;
+    hv->setDefaultSectionSize(defaultSize + 1); // Set it to a value different from defaultSize.
+
+    // no hidden Sections
+    hv->resizeSection(1, 0);
+    hv->setDefaultSectionSize(defaultSize);
+    QVERIFY(hv->sectionSize(1) == defaultSize);
+
+    // with hidden sections
+    hv->resizeSection(1, 0);
+    hv->hideSection(2);
+    hv->setDefaultSectionSize(defaultSize);
+
+    QVERIFY(hv->sectionSize(0) == defaultSize); // trivial case.
+    QVERIFY(hv->sectionSize(1) == defaultSize); // just sized 0. Now it should be 10
+    QVERIFY(hv->sectionSize(2) == 0); // section is hidden. It should not be resized.
+}
+
+
 void tst_QHeaderView::defaultAlignment_data()
 {
     QTest::addColumn<int>("direction");