diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 7739ff7de..8954b4e25 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -834,6 +834,8 @@ list( APPEND SOURCES
       tracks/timetrack/ui/TimeTrackControls.h
       tracks/timetrack/ui/TimeTrackVRulerControls.cpp
       tracks/timetrack/ui/TimeTrackVRulerControls.h
+      tracks/timetrack/ui/TimeTrackVZoomHandle.cpp
+      tracks/timetrack/ui/TimeTrackVZoomHandle.h
       tracks/timetrack/ui/TimeTrackView.cpp
       tracks/timetrack/ui/TimeTrackView.h