diff --git a/Userland/Libraries/LibGUI/ComboBox.cpp b/Userland/Libraries/LibGUI/ComboBox.cpp
index 7895b108ff..58615c6948 100644
--- a/Userland/Libraries/LibGUI/ComboBox.cpp
+++ b/Userland/Libraries/LibGUI/ComboBox.cpp
@@ -39,6 +39,7 @@ private:
             set_focus(true);
         if (on_mousewheel)
             on_mousewheel(event.wheel_delta_y());
+        event.accept();
     }
 
     virtual void keydown_event(KeyEvent& event) override
diff --git a/Userland/Libraries/LibGUI/SpinBox.cpp b/Userland/Libraries/LibGUI/SpinBox.cpp
index a2acc9ffc1..3ce4d3695f 100644
--- a/Userland/Libraries/LibGUI/SpinBox.cpp
+++ b/Userland/Libraries/LibGUI/SpinBox.cpp
@@ -108,6 +108,7 @@ void SpinBox::mousewheel_event(MouseEvent& event)
     if (event.modifiers() == KeyModifier::Mod_Ctrl)
         wheel_delta *= 6;
     set_value(m_value - wheel_delta);
+    event.accept();
 }
 
 void SpinBox::resize_event(ResizeEvent& event)