diff --git a/src/calls-contacts-row.c b/src/calls-contacts-row.c
index 6fcc5a5..f8845a9 100644
--- a/src/calls-contacts-row.c
+++ b/src/calls-contacts-row.c
@@ -48,6 +48,7 @@ insert_phonenumber (CallsContactsRow *self,
   gtk_actionable_set_action_name (GTK_ACTIONABLE (button), "app.dial");
   gtk_actionable_set_action_target (GTK_ACTIONABLE (button), "s", number, NULL);
   gtk_widget_set_visible (button, TRUE);
+  gtk_widget_add_css_class (button, "flat");
   gtk_grid_attach_next_to (GTK_GRID (self->grid),
                            button,
                            label,
diff --git a/src/ui/call-record-row.ui b/src/ui/call-record-row.ui
index 3838bd1..811a064 100644
--- a/src/ui/call-record-row.ui
+++ b/src/ui/call-record-row.ui
@@ -53,6 +53,9 @@
             <property name="valign">center</property>
             <property name="tooltip-text">Call</property>
             <property name="icon-name">call-start-symbolic</property>
+            <style>
+              <class name="flat"/>
+            </style>
           </object>
         </child>
       </object>