diff --git a/res/res_srtp.c b/res/res_srtp.c
index 62115afab5..8d8daf0b03 100644
--- a/res/res_srtp.c
+++ b/res/res_srtp.c
@@ -40,6 +40,7 @@
 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 
 #include <srtp/srtp.h>
+#include <srtp/crypto_kernel.h>
 
 #include "asterisk/lock.h"
 #include "asterisk/sched.h"