diff --git a/events/x11/x11events.cpp b/events/x11/x11events.cpp
index ac7040b1..4533cf73 100644
--- a/events/x11/x11events.cpp
+++ b/events/x11/x11events.cpp
@@ -44,18 +44,18 @@ public:
     EventData();
 
     //keyboard
-    Display *dpy;
-    signed char modifiers[0x100];
-    KeyCode keycodes[0x100];
-    KeyCode leftShiftCode;
-    KeyCode rightShiftCode;
-    KeyCode altGrCode;
-    char modifierState;
+    Display *dpy = nullptr;
+    signed char modifiers[0x100] = {};
+    KeyCode keycodes[0x100] = {};
+    KeyCode leftShiftCode = 0;
+    KeyCode rightShiftCode = 0;
+    KeyCode altGrCode = 0;
+    char modifierState = 0;
 
     //mouse
-    int buttonMask;
-    int x;
-    int y;
+    int buttonMask = 0;
+    int x = 0;
+    int y = 0;
 
 private:
     void init();
diff --git a/events/xdp/xdpevents.cpp b/events/xdp/xdpevents.cpp
index 609f1544..45534936 100644
--- a/events/xdp/xdpevents.cpp
+++ b/events/xdp/xdpevents.cpp
@@ -36,9 +36,9 @@ public:
     EventData();
 
     //mouse
-    int buttonMask;
-    int x;
-    int y;
+    int buttonMask = 0;
+    int x = 0;
+    int y = 0;
 
     QScopedPointer<OrgFreedesktopPortalRemoteDesktopInterface> dbusXdpRemoteDesktopService;
 
@@ -55,8 +55,6 @@ EventData::EventData()
 
 void EventData::init()
 {
-    buttonMask = 0;
-
     dbusXdpRemoteDesktopService.reset(new OrgFreedesktopPortalRemoteDesktopInterface(QLatin1String("org.freedesktop.portal.Desktop"),
                                       QLatin1String("/org/freedesktop/portal/desktop"), QDBusConnection::sessionBus()));
 }
diff --git a/framebuffers/pipewire/pw_framebuffer.cpp b/framebuffers/pipewire/pw_framebuffer.cpp
index 0299a277..764296dd 100644
--- a/framebuffers/pipewire/pw_framebuffer.cpp
+++ b/framebuffers/pipewire/pw_framebuffer.cpp
@@ -176,10 +176,10 @@ private:
     struct {
         quint32 width;
         quint32 height;
-    } screenGeometry;
+    } screenGeometry = {};
 
     // Allowed devices
-    uint devices;
+    uint devices = 0;
 
     // sanity indicator
     bool isValid = true;
diff --git a/krfb/framebuffer.h b/krfb/framebuffer.h
index e7256f03..d9008d83 100644
--- a/krfb/framebuffer.h
+++ b/krfb/framebuffer.h
@@ -51,7 +51,7 @@ Q_SIGNALS:
 
 protected:
     WId win;
-    char *fb;
+    char *fb = nullptr;
     QList<QRect> tiles;
 
 private:
diff --git a/krfb/invitationsrfbclient.cpp b/krfb/invitationsrfbclient.cpp
index a0f72445..7673dc35 100644
--- a/krfb/invitationsrfbclient.cpp
+++ b/krfb/invitationsrfbclient.cpp
@@ -41,7 +41,7 @@ struct PendingInvitationsRfbClient::Private
     {}
 
     rfbClientPtr client;
-    QSocketNotifier *notifier;
+    QSocketNotifier *notifier = nullptr;
     bool askOnConnect;
 };
 
diff --git a/krfb/invitationsrfbserver.h b/krfb/invitationsrfbserver.h
index f5641e10..5f72fffc 100644
--- a/krfb/invitationsrfbserver.h
+++ b/krfb/invitationsrfbserver.h
@@ -63,11 +63,11 @@ private Q_SLOTS:
     void walletOpened(bool);
 
 private:
-    KDNSSD::PublicService *m_publicService;
+    KDNSSD::PublicService *m_publicService = nullptr;
     bool m_allowUnattendedAccess;
     QString m_desktopPassword;
     QString m_unattendedPassword;
-    KWallet::Wallet *m_wallet;
+    KWallet::Wallet *m_wallet = nullptr;
 
     QString readableRandomString(int);
     Q_DISABLE_COPY(InvitationsRfbServer)