diff --git i/src/wayland/session_lock.cpp w/src/wayland/session_lock.cpp
index 0ecf9ec..3dbd19b 100644
--- i/src/wayland/session_lock.cpp
+++ w/src/wayland/session_lock.cpp
@@ -127,6 +127,7 @@ void WlSessionLock::realizeLockTarget(WlSessionLock* old) {
 		this->updateSurfaces(false);
 
 		if (!this->manager->lock()) this->lockTarget = false;
+		emit this->lockStateChanged();
 
 		this->updateSurfaces(true, old);
 	} else {