diff --git a/apps/app_voicemail.c b/apps/app_voicemail.c
index df5823220fe77df2a4c3924b54de6bd7fe0cf344..92e3859af0bba988dbadc106361b89321076806f 100644
--- a/apps/app_voicemail.c
+++ b/apps/app_voicemail.c
@@ -375,7 +375,7 @@ struct ast_vm_user {
 	char zonetag[80];                /*!< Time zone */
 	char callback[80];
 	char dialout[80];
-	char uniqueid[20];               /*!< Unique integer identifier */
+	char uniqueid[80];               /*!< Unique integer identifier */
 	char exit[80];
 	char attachfmt[20];              /*!< Attachment format */
 	unsigned int flags;              /*!< VM_ flags */