--- res/res_srtp.c	(Asterisk 13.21)
+++ res/res_srtp.c	(working copy)
@@ -31,4 +31,5 @@
 /*** MODULEINFO
 	<depend>srtp</depend>
+	<use type="external">openssl</use>
 	<support_level>core</support_level>
 ***/