diff --git a/UI/cmake/legacy.cmake b/UI/cmake/legacy.cmake
index 3e5789629..83b9493d4 100644
--- a/UI/cmake/legacy.cmake
+++ b/UI/cmake/legacy.cmake
@@ -172,7 +172,6 @@ target_sources(
           item-widget-helpers.hpp
           context-bar-controls.cpp
           context-bar-controls.hpp
-          expand-checkbox.hpp
           focus-list.cpp
           focus-list.hpp
           hotkey-edit.cpp
diff --git a/UI/cmake/ui-elements.cmake b/UI/cmake/ui-elements.cmake
index a24cd9b59..805dd573f 100644
--- a/UI/cmake/ui-elements.cmake
+++ b/UI/cmake/ui-elements.cmake
@@ -11,7 +11,6 @@ target_sources(
           context-bar-controls.hpp
           double-slider.cpp
           double-slider.hpp
-          expand-checkbox.hpp
           focus-list.cpp
           focus-list.hpp
           horizontal-scroll-area.cpp
diff --git a/UI/expand-checkbox.hpp b/UI/expand-checkbox.hpp
deleted file mode 100644
index b83160d00..000000000
--- a/UI/expand-checkbox.hpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#include <QCheckBox>
-
-class ExpandCheckBox : public QCheckBox {
-	Q_OBJECT
-};
diff --git a/UI/source-tree.cpp b/UI/source-tree.cpp
index dd7af31f4..3cfdcd5ed 100644
--- a/UI/source-tree.cpp
+++ b/UI/source-tree.cpp
@@ -4,7 +4,6 @@
 #include "qt-wrappers.hpp"
 #include "visibility-checkbox.hpp"
 #include "locked-checkbox.hpp"
-#include "expand-checkbox.hpp"
 #include "platform.hpp"
 
 #include <obs-frontend-api.h>