diff --git a/src/libs/timeline/qml/lock_closed.png b/src/libs/timeline/qml/lock_closed.png
deleted file mode 100644
index aeeee2cbb37..00000000000
Binary files a/src/libs/timeline/qml/lock_closed.png and /dev/null differ
diff --git a/src/libs/timeline/qml/lock_open.png b/src/libs/timeline/qml/lock_open.png
deleted file mode 100644
index 9906fc7ea09..00000000000
Binary files a/src/libs/timeline/qml/lock_open.png and /dev/null differ
diff --git a/src/libs/timeline/qml/timeline.qrc b/src/libs/timeline/qml/timeline.qrc
index de6701d5aa0..18b3cd2d4a9 100644
--- a/src/libs/timeline/qml/timeline.qrc
+++ b/src/libs/timeline/qml/timeline.qrc
@@ -6,8 +6,6 @@
         <file>RangeDetails.qml</file>
         <file>RangeMover.qml</file>
         <file>TimeDisplay.qml</file>
-        <file>lock_closed.png</file>
-        <file>lock_open.png</file>
         <file>ico_edit.png</file>
         <file>TimeMarks.qml</file>
         <file>Overview.qml</file>
diff --git a/src/libs/timeline/timelinetheme.cpp b/src/libs/timeline/timelinetheme.cpp
index d0306a3d7f5..853c42c972a 100644
--- a/src/libs/timeline/timelinetheme.cpp
+++ b/src/libs/timeline/timelinetheme.cpp
@@ -78,11 +78,9 @@ public:
             icon = Utils::Icon({{QLatin1String(":/timeline/ico_edit.png"),
                                  Utils::Theme::IconsBaseColor}});
         else if (iconName == QLatin1String("lock_open"))
-            icon = Utils::Icon({{QLatin1String(":/timeline/lock_open.png"),
-                                 Utils::Theme::IconsBaseColor}});
+            icon = Utils::Icons::UNLOCKED_TOOLBAR;
         else if (iconName == QLatin1String("lock_closed"))
-            icon = Utils::Icon({{QLatin1String(":/timeline/lock_closed.png"),
-                                 Utils::Theme::IconsBaseColor}});
+            icon = Utils::Icons::LOCKED_TOOLBAR;
         else if (iconName == QLatin1String("range_handle"))
             icon = Utils::Icon({{QLatin1String(":/timeline/range_handle.png"),
                                  Utils::Theme::IconsBaseColor}});