diff --git a/src/widgets/dialogs/qfiledialog.cpp b/src/widgets/dialogs/qfiledialog.cpp
index 0ba3ea40e0..6065ad015e 100644
--- a/src/widgets/dialogs/qfiledialog.cpp
+++ b/src/widgets/dialogs/qfiledialog.cpp
@@ -510,7 +510,7 @@ bool QFileDialog::restoreState(const QByteArray &state)
     if (!d->qFileDialogUi->splitter->restoreState(d->splitterState))
         return false;
     QList<int> list = d->qFileDialogUi->splitter->sizes();
-    if (list.count() >= 2 && list.at(0) == 0 && list.at(1) == 0) {
+    if (list.count() >= 2 && (list.at(0) == 0 || list.at(1) == 0)) {
         for (int i = 0; i < list.count(); ++i)
             list[i] = d->qFileDialogUi->splitter->widget(i)->sizeHint().width();
         d->qFileDialogUi->splitter->setSizes(list);
diff --git a/src/widgets/dialogs/qfiledialog.ui b/src/widgets/dialogs/qfiledialog.ui
index 89adaf530e..7f6e59c908 100644
--- a/src/widgets/dialogs/qfiledialog.ui
+++ b/src/widgets/dialogs/qfiledialog.ui
@@ -179,6 +179,9 @@
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
+     <property name="childrenCollapsible">
+      <bool>false</bool>
+     </property>
      <widget class="QSidebar" name="sidebar">
       <property name="accessibleName">
        <string>Sidebar</string>
diff --git a/src/widgets/dialogs/qfiledialog_embedded.ui b/src/widgets/dialogs/qfiledialog_embedded.ui
index 69fc3255a1..4cdc620437 100644
--- a/src/widgets/dialogs/qfiledialog_embedded.ui
+++ b/src/widgets/dialogs/qfiledialog_embedded.ui
@@ -121,6 +121,9 @@
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
+     <property name="childrenCollapsible">
+      <bool>false</bool>
+     </property>
      <widget class="QSidebar" name="sidebar"/>
      <widget class="QFrame" name="frame">
       <property name="frameShape">