diff --git a/app/views/proposals/show.html.haml b/app/views/proposals/show.html.haml
index 5d2dd948..d80e912f 100644
--- a/app/views/proposals/show.html.haml
+++ b/app/views/proposals/show.html.haml
@@ -25,9 +25,10 @@
     .col-md-4
       %p{style: "margin-top: 20px"}
         - if @event_schedule&.start_time
-          = link_to google_calendar_link(@event_schedule), target: '_blank', class: 'btn btn-success btn-mini' do
-            %i.fa.fa-calendar
-            Add to Google Calendar (beta)
+          - if user_signed_in?
+            = link_to google_calendar_link(@event_schedule), target: '_blank', class: 'btn btn-success btn-mini' do
+              %i.fa.fa-calendar
+              Add to Google Calendar (beta)
         - if can?(:update, @event) && @event.require_registration?
           = link_to 'Registrations', registrations_conference_program_proposal_path(@conference.short_title, @event), class: 'btn btn-mini btn-success'
         - if can?(:edit, @event)