diff --git a/src/corelib/io/qdirlisting.cpp b/src/corelib/io/qdirlisting.cpp
index a753dad13bd..db8e4ea4e29 100644
--- a/src/corelib/io/qdirlisting.cpp
+++ b/src/corelib/io/qdirlisting.cpp
@@ -725,8 +725,8 @@ QDirListing::const_iterator QDirListing::begin() const
 */
 QDirListing::const_iterator &QDirListing::const_iterator::operator++()
 {
-    dirListPtr->advance();
-    if (!dirListPtr->hasIterators())
+    dirEntry.dirListPtr->advance();
+    if (!dirEntry.dirListPtr->hasIterators())
         *this = {}; // All done, make `this` equal to the end() iterator
     return *this;
 }
diff --git a/src/corelib/io/qdirlisting.h b/src/corelib/io/qdirlisting.h
index d4900556a3f..9d83411728c 100644
--- a/src/corelib/io/qdirlisting.h
+++ b/src/corelib/io/qdirlisting.h
@@ -103,8 +103,7 @@ public:
     class const_iterator
     {
         friend class QDirListing;
-        const_iterator(QDirListingPrivate *dp) : dirListPtr(dp) { dirEntry.dirListPtr = dp; }
-        QDirListingPrivate *dirListPtr = nullptr;
+        explicit const_iterator(QDirListingPrivate *dp) { dirEntry.dirListPtr = dp; }
         DirEntry dirEntry;
     public:
         using iterator_category = std::input_iterator_tag;
@@ -118,10 +117,9 @@ public:
         pointer operator->() const { return &dirEntry; }
         Q_CORE_EXPORT const_iterator &operator++();
         const_iterator operator++(int) { auto tmp = *this; operator++(); return tmp; };
-        friend bool operator==(const const_iterator &lhs, sentinel) noexcept
-        {
-            return lhs.dirListPtr == nullptr;
-        }
+    private:
+        bool atEnd() const noexcept { return dirEntry.dirListPtr == nullptr; }
+        friend bool operator==(const const_iterator &lhs, sentinel) noexcept { return lhs.atEnd(); }
 #ifndef __cpp_impl_three_way_comparison
         friend bool operator!=(const const_iterator &lhs, sentinel) noexcept
         { return !operator==(lhs, sentinel{}); }