diff --git a/gramps/plugins/tool/relcalc.glade b/gramps/plugins/tool/relcalc.glade
index b0636260d..11938cc4d 100644
--- a/gramps/plugins/tool/relcalc.glade
+++ b/gramps/plugins/tool/relcalc.glade
@@ -93,6 +93,7 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="shadow_type">in</property>
+                <property name="min_content_height">75</property>
                 <child>
                   <object class="GtkTextView" id="text1">
                     <property name="height_request">75</property>