Index: apps/app_voicemail.c
===================================================================
--- apps/app_voicemail.c	(revision 266147)
+++ apps/app_voicemail.c	(working copy)
@@ -1716,7 +1716,7 @@
 
 	/* This will only work for new messages... */
 	ast_mutex_lock(&vms->lock);
-	header_content = mail_fetchheader (vms->mailstream, vms->msgArray[msgnum]);
+	header_content = ast_strdupa(mail_fetchheader(vms->mailstream, vms->msgArray[msgnum]));
 	ast_mutex_unlock(&vms->lock);
 	/* empty string means no valid header */
 	if (ast_strlen_zero(header_content)) {