LockWatcher: Add chrono header

diff --git a/src/gui/lockwatcher.h b/src/gui/lockwatcher.h
index f5e27bac617a2695bee8a90733285feaca3e8160..20badcf515962ece7f0f7dedb9afbee60fbaaf05 100644 (file)
--- a/src/gui/lockwatcher.h
+++ b/src/gui/lockwatcher.h
@@ -22,6 +22,8 @@
 #include <QSet>
 #include <QTimer>
 
+#include <chrono>
+
 namespace OCC {
 
 /**