--- res/srtp/srtp_compat.h	(Asterisk 13.17)
+++ res/srtp/srtp_compat.h	(working copy)
@@ -7,3 +7,7 @@
 
+#if defined(SRTP_AES_ICM_128)
+#define AES_128_ICM SRTP_AES_ICM_128
+#else
 #define AES_128_ICM SRTP_AES_ICM
+#endif
 #define HMAC_SHA1 SRTP_HMAC_SHA1