diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index d2bf108756..6420b5d6eb 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -53,6 +53,7 @@
 
 /*** MODULEINFO
 	<use type="module">res_crypto</use>
+	<use type="external">crypto</use>
 	<support_level>core</support_level>
  ***/
 
diff --git a/funcs/func_aes.c b/funcs/func_aes.c
index af3f257e50..6a56909d38 100644
--- a/funcs/func_aes.c
+++ b/funcs/func_aes.c
@@ -24,6 +24,7 @@
 
 /*** MODULEINFO
 	<use type="module">res_crypto</use>
+	<use type="external">crypto</use>
 	<support_level>core</support_level>
  ***/
 
diff --git a/pbx/pbx_dundi.c b/pbx/pbx_dundi.c
index 0420917231..e356d6fdef 100644
--- a/pbx/pbx_dundi.c
+++ b/pbx/pbx_dundi.c
@@ -33,6 +33,7 @@
 /*** MODULEINFO
 	<depend>zlib</depend>
 	<use type="module">res_crypto</use>
+	<use type="external">crypto</use>
 	<support_level>extended</support_level>
  ***/