diff --git a/data/ui/edit-dialog.ui b/data/ui/edit-dialog.ui
index e52945b6..e26e54a4 100644
--- a/data/ui/edit-dialog.ui
+++ b/data/ui/edit-dialog.ui
@@ -52,6 +52,9 @@
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>
                     <property name="valign">start</property>
+                    <style>
+                      <class name="calendar-color-image"/>
+                    </style>
                   </object>
                 </child>
                 <child>