diff --git a/data/ui/library-panel.ui b/data/ui/library-panel.ui
index b5512e3..26e8c77 100644
--- a/data/ui/library-panel.ui
+++ b/data/ui/library-panel.ui
@@ -169,11 +169,10 @@
                 <child>
                   <object class="GtkBox" id="progress_box">
                     <property name="orientation">vertical</property>
-                    <property name="valign">center</property>
-                    <child>
+                    <child type="center">
                       <object class="GtkBox">
                         <property name="orientation">vertical</property>
-                        <child>
+                        <child type="center">
                           <object class="GtkBox">
                             <property name="halign">center</property>
                             <property name="orientation">vertical</property>