diff --git a/src/widgets/widgets/qcombobox.cpp b/src/widgets/widgets/qcombobox.cpp
index 2da6183a1e0..9caac239f96 100644
--- a/src/widgets/widgets/qcombobox.cpp
+++ b/src/widgets/widgets/qcombobox.cpp
@@ -2135,7 +2135,11 @@ void QComboBoxPrivate::setCurrentIndex(const QModelIndex &mi)
         }
         updateLineEditGeometry();
     }
-    if (indexChanged) {
+    // If the model was reset to an empty, currentIndex will be invalidated
+    // (because it's a QPersistentModelIndex), but the index change will never
+    // be advertised. So we need an explicit check for such condition.
+    const bool modelResetToEmpty = !normalized.isValid() && indexBeforeChange != -1;
+    if (indexChanged || modelResetToEmpty) {
         q->update();
         _q_emitCurrentIndexChanged(currentIndex);
     }
diff --git a/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp b/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
index 987db3e3998..4ca3a1b5a5f 100644
--- a/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
+++ b/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
@@ -146,6 +146,7 @@ private slots:
     void checkEmbeddedLineEditWhenStyleSheetIsSet();
     void propagateStyleChanges();
     void buttonPressKeys();
+    void clearModel();
 
 private:
     PlatformInputContext m_platformInputContext;
@@ -3593,5 +3594,37 @@ void tst_QComboBox::buttonPressKeys()
     }
 }
 
+void tst_QComboBox::clearModel()
+{
+    using namespace Qt::StringLiterals;
+    QStringListModel model({ "one"_L1, "two"_L1, "three"_L1 });
+
+    QComboBox combo;
+    combo.setModel(&model);
+    combo.setCurrentIndex(1);
+
+    QCOMPARE(combo.currentIndex(), 1);
+    QCOMPARE(combo.currentText(), model.index(1).data().toString());
+
+    QSignalSpy indexSpy(&combo, &QComboBox::currentIndexChanged);
+    QSignalSpy textSpy(&combo, &QComboBox::currentTextChanged);
+
+    QVERIFY(indexSpy.isEmpty());
+    QVERIFY(textSpy.isEmpty());
+
+    model.setStringList({});
+
+    QCOMPARE(indexSpy.count(), 1);
+    const int index = indexSpy.takeFirst().at(0).toInt();
+    QCOMPARE(index, -1);
+
+    QCOMPARE(textSpy.count(), 1);
+    const QString text = textSpy.takeFirst().at(0).toString();
+    QCOMPARE(text, QString());
+
+    QCOMPARE(combo.currentIndex(), -1);
+    QCOMPARE(combo.currentText(), QString());
+}
+
 QTEST_MAIN(tst_QComboBox)
 #include "tst_qcombobox.moc"