--- pbx/pbx_dundi.c	(Asterisk 13.21)
+++ pbx/pbx_dundi.c	(working copy)
@@ -35,2 +35,3 @@
 	<use type="module">res_crypto</use>
+	<use type="external">crypto</use>
 	<support_level>extended</support_level>
--- funcs/func_aes.c	(Asterisk 13.21)
+++ funcs/func_aes.c	(working copy)
@@ -26,2 +26,3 @@
 	<use type="module">res_crypto</use>
+	<use type="external">crypto</use>
 	<support_level>core</support_level>
--- channels/chan_iax2.c	(Asterisk 13.21)
+++ channels/chan_iax2.c	(working copy)
@@ -55,2 +55,3 @@
 	<use type="module">res_crypto</use>
+	<use type="external">crypto</use>
 	<support_level>core</support_level>