diff --git a/Userland/Libraries/LibGUI/TextEditor.cpp b/Userland/Libraries/LibGUI/TextEditor.cpp
index 56b6a8be544..bbf1ae116f5 100644
--- a/Userland/Libraries/LibGUI/TextEditor.cpp
+++ b/Userland/Libraries/LibGUI/TextEditor.cpp
@@ -1806,4 +1806,13 @@ int TextEditor::number_of_visible_lines() const
     return visible_content_rect().height() / line_height();
 }
 
+void TextEditor::set_ruler_visible(bool visible)
+{
+    if (m_ruler_visible == visible)
+        return;
+    m_ruler_visible = visible;
+    recompute_all_visual_lines();
+    update();
+}
+
 }
diff --git a/Userland/Libraries/LibGUI/TextEditor.h b/Userland/Libraries/LibGUI/TextEditor.h
index 3abb87b1d61..d7e1a1a6449 100644
--- a/Userland/Libraries/LibGUI/TextEditor.h
+++ b/Userland/Libraries/LibGUI/TextEditor.h
@@ -108,7 +108,7 @@ public:
     void set_mode(const Mode);
 
     bool is_ruler_visible() const { return m_ruler_visible; }
-    void set_ruler_visible(bool b) { m_ruler_visible = b; }
+    void set_ruler_visible(bool);
 
     void set_icon(const Gfx::Bitmap*);
     const Gfx::Bitmap* icon() const { return m_icon; }