diff --git a/imap/mboxevent.c b/imap/mboxevent.c
index 641e345062..0c8229506c 100644
--- a/imap/mboxevent.c
+++ b/imap/mboxevent.c
@@ -1701,7 +1701,6 @@ EXPORTED void mboxevent_extract_mailbox(struct mboxevent *event,
     imapurl_toURL(&url, &imapurl);
     FILL_STRING_PARAM(event, EVENT_URI, buf_release(&url));
 
-    buf_free(&url);
     free(extname);
 
     FILL_STRING_PARAM(event, EVENT_MBTYPE,
@@ -1811,7 +1810,6 @@ void mboxevent_extract_old_mailbox(struct mboxevent *event,
     imapurl_toURL(&url, &imapurl);
     FILL_STRING_PARAM(event, EVENT_OLD_MAILBOX_ID, buf_release(&url));
 
-    buf_free(&url);
     free(extname);
 }