diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index f4dfb3c2ecf..17b39036747 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -425,24 +425,7 @@ static inline bool contains(int argc, char **argv, const char *needle)
 #endif // Q_OS_WIN
 
 QCoreApplicationPrivate::QCoreApplicationPrivate(int &aargc, char **aargv)
-    :
-#ifndef QT_NO_QOBJECT
-      QObjectPrivate(),
-#endif
-      argc(aargc)
-    , argv(aargv)
-#if defined(Q_OS_WIN)
-    , origArgc(0)
-    , origArgv(nullptr)
-#endif
-    , application_type(QCoreApplicationPrivate::Tty)
-#ifndef QT_NO_QOBJECT
-    , in_exec(false)
-    , aboutToQuitEmitted(false)
-    , threadData_clean(false)
-#else
-    , q_ptr(nullptr)
-#endif
+    : argc(aargc), argv(aargv)
 {
     static const char *const empty = "";
     if (argc == 0 || argv == nullptr) {
diff --git a/src/corelib/kernel/qcoreapplication_p.h b/src/corelib/kernel/qcoreapplication_p.h
index aabbaf5a3f8..dce8cee1cc6 100644
--- a/src/corelib/kernel/qcoreapplication_p.h
+++ b/src/corelib/kernel/qcoreapplication_p.h
@@ -127,8 +127,8 @@ public:
     int &argc;
     char **argv;
 #if defined(Q_OS_WIN)
-    int origArgc;
-    char **origArgv; // store unmodified arguments for QCoreApplication::arguments()
+    int origArgc = 0;
+    char **origArgv = nullptr; // store unmodified arguments for QCoreApplication::arguments()
     bool consoleAllocated = false;
 #endif
     void appendApplicationPathToLibraryPaths(void);
@@ -139,7 +139,7 @@ public:
     static bool isTranslatorInstalled(QTranslator *translator);
 #endif
 
-    QCoreApplicationPrivate::Type application_type;
+    Type application_type = Tty;
 
     QString cachedApplicationDirPath;
     static QString *cachedApplicationFilePath;
@@ -149,9 +149,9 @@ public:
 #ifndef QT_NO_QOBJECT
     void execCleanup();
 
-    bool in_exec;
-    bool aboutToQuitEmitted;
-    bool threadData_clean;
+    bool in_exec = false;
+    bool aboutToQuitEmitted = false;
+    bool threadData_clean = false;
 
     static QAbstractEventDispatcher *eventDispatcher;
     static bool is_app_running;
@@ -167,7 +167,7 @@ public:
     inline QString qmljsDebugArgumentsString() const { return qmljs_debug_arguments; }
 
 #ifdef QT_NO_QOBJECT
-    QCoreApplication *q_ptr;
+    QCoreApplication *q_ptr = nullptr;
 #endif
 };