diff --git a/Userland/Applications/SystemMonitor/GraphWidget.cpp b/Userland/Applications/SystemMonitor/GraphWidget.cpp
index 45133456cc2..c592a1900ae 100644
--- a/Userland/Applications/SystemMonitor/GraphWidget.cpp
+++ b/Userland/Applications/SystemMonitor/GraphWidget.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "GraphWidget.h"
+#include <LibCore/Object.h>
 #include <LibGUI/Application.h>
 #include <LibGUI/Painter.h>
 #include <LibGfx/Font.h>
@@ -17,6 +18,17 @@ REGISTER_WIDGET(SystemMonitor, GraphWidget)
 
 namespace SystemMonitor {
 
+GraphWidget::GraphWidget()
+{
+    REGISTER_BOOL_PROPERTY("stack_values", stack_values, set_stack_values);
+}
+
+void GraphWidget::set_stack_values(bool stack_values)
+{
+    m_stack_values = stack_values;
+    update();
+}
+
 void GraphWidget::add_value(Vector<u64, 1>&& value)
 {
     m_values.enqueue(move(value));
diff --git a/Userland/Applications/SystemMonitor/GraphWidget.h b/Userland/Applications/SystemMonitor/GraphWidget.h
index d988127dd38..26f078fdd21 100644
--- a/Userland/Applications/SystemMonitor/GraphWidget.h
+++ b/Userland/Applications/SystemMonitor/GraphWidget.h
@@ -34,10 +34,11 @@ public:
             m_value_format.resize(index + 1);
         m_value_format[index] = move(format);
     }
-    void set_stack_values(bool stack_values) { m_stack_values = stack_values; }
+    void set_stack_values(bool stack_values);
+    bool stack_values() const { return m_stack_values; }
 
 private:
-    explicit GraphWidget() = default;
+    explicit GraphWidget();
 
     virtual void paint_event(GUI::PaintEvent&) override;