diff --git a/crypto/cms/cms_enc.c b/crypto/cms/cms_enc.c
index 3f1328c041..ea8f07e1af 100644
--- a/crypto/cms/cms_enc.c
+++ b/crypto/cms/cms_enc.c
@@ -15,6 +15,7 @@
 #include <openssl/cms.h>
 #include <openssl/rand.h>
 #include "crypto/evp.h"
+#include "crypto/asn1.h"
 #include "cms_local.h"
 
 /* CMS EncryptedData Utilities */