diff --git a/gramps/gui/glade/book.glade b/gramps/gui/glade/book.glade
index 3dfc2e8a2..77cad4642 100644
--- a/gramps/gui/glade/book.glade
+++ b/gramps/gui/glade/book.glade
@@ -7,6 +7,7 @@
     <property name="height_request">600</property>
     <property name="can_focus">False</property>
     <property name="title" translatable="yes">Book</property>
+    <property name="window_position">center</property>
     <child>
       <object class="GtkBox" id="vbox4">
         <property name="visible">True</property>