diff --git a/virtualkeyboard.cpp b/virtualkeyboard.cpp
--- a/virtualkeyboard.cpp
+++ b/virtualkeyboard.cpp
@@ -27,6 +27,7 @@
 #include "workspace.h"
 #include "xkb.h"
 #include "xdgshellclient.h"
+#include "screenlockerwatcher.h"
 
 #include <KWayland/Server/display.h>
 #include <KWayland/Server/seat_interface.h>
@@ -87,6 +88,8 @@
     }
     m_inputWindow->setProperty("__kwin_input_method", true);
 
+    connect(ScreenLockerWatcher::self(), &ScreenLockerWatcher::aboutToLock, this, &VirtualKeyboard::hide);
+
     if (waylandServer()) {
         m_enabled = !input()->hasAlphaNumericKeyboard();
         qCDebug(KWIN_VIRTUALKEYBOARD) << "enabled by default: " << m_enabled;
@@ -289,6 +292,7 @@
     if (m_inputWindow.isNull()) {
         return;
     }
+    m_inputWindow->hide();
     qApp->inputMethod()->hide();
 }