diff --git a/libkworkspace/sessionmanagement.cpp b/libkworkspace/sessionmanagement.cpp
--- a/libkworkspace/sessionmanagement.cpp
+++ b/libkworkspace/sessionmanagement.cpp
@@ -62,6 +62,8 @@
     connect(backend, &SessionBackend::canSuspendChanged, this, &SessionManagement::canSuspendChanged);
     connect(backend, &SessionBackend::canHybridSuspendChanged, this, &SessionManagement::canHybridSuspendChanged);
     connect(backend, &SessionBackend::canHibernateChanged, this, &SessionManagement::canHibernateChanged);
+    connect(backend, &SessionBackend::aboutToSuspend, this, &SessionManagement::aboutToSuspend);
+    connect(backend, &SessionBackend::resumingFromSuspend, this, &SessionManagement::resumingFromSuspend);
 }
 
 bool SessionManagement::canShutdown() const
diff --git a/lookandfeel/contents/lockscreen/LockScreenUi.qml b/lookandfeel/contents/lockscreen/LockScreenUi.qml
--- a/lookandfeel/contents/lockscreen/LockScreenUi.qml
+++ b/lookandfeel/contents/lockscreen/LockScreenUi.qml
@@ -57,6 +57,17 @@
         }
     }
 
+    SessionManagement {
+        id: sessionManagement
+    }
+
+    Connections {
+        target: sessionManagement
+        onAboutToSuspend: {
+            mainBlock.mainPasswordBox.text = "";
+        }
+    }
+
     SessionsModel {
         id: sessionsModel
         showNewSessionEntry: false