diff --git a/gtk/inspector/css-editor.ui b/gtk/inspector/css-editor.ui
index a61e4a1133..e6fd0a69b2 100644
--- a/gtk/inspector/css-editor.ui
+++ b/gtk/inspector/css-editor.ui
@@ -44,6 +44,7 @@
       <object class="GtkScrolledWindow">
         <property name="visible">True</property>
         <property name="expand">True</property>
+        <property name="shadow-type">in</property>
         <child>
           <object class="GtkTextView" id="view">
             <property name="visible">True</property>