diff --git a/plugins/itip-formatter/org-gnome-itip-formatter.error.xml b/plugins/itip-formatter/org-gnome-itip-formatter.error.xml
index 1a47eda..e5d84c6 100644
--- a/plugins/itip-formatter/org-gnome-itip-formatter.error.xml
+++ b/plugins/itip-formatter/org-gnome-itip-formatter.error.xml
@@ -2,14 +2,16 @@
 <error-list domain="org.gnome.itip-formatter">
 
  <error id="add-unknown-attendee" type="question">
-  <_primary>This response is not from a current attendee.  Add the sender as an attendee?</_primary>
+  <_primary>This response is not from a current attendee. Add the sender as an attendee?</_primary>
+  <button stock="gtk-yes" response="GTK_RESPONSE_YES"/>
+  <button stock="gtk-no" response="GTK_RESPONSE_NO"/>
  </error>
  
  <error id="add-delegate" type="question">
   <_primary>This meeting has been delegated</_primary>
-  <_secondary>&quot;{0}&quot; has delegated the meeting. Do you want to add the delegate &quot;{1}&quot;?</_secondary>
-  <button _label="Yes" response="GTK_RESPONSE_YES"/>
-  <button _label="No" response="GTK_RESPONSE_NO"/>
+  <_secondary>'{0}' has delegated the meeting. Do you want to add the delegate '{1}'?</_secondary>
+  <button stock="gtk-yes" response="GTK_RESPONSE_YES"/>
+  <button stock="gtk-no" response="GTK_RESPONSE_NO"/>
  </error>
 
 </error-list>
