1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/libcrypto/ocsp/ocsp_asn.c b/src/lib/libcrypto/ocsp/ocsp_asn.c
index 6a3a360d54..39b7a1c568 100644
--- a/src/lib/libcrypto/ocsp/ocsp_asn.c
+++ b/src/lib/libcrypto/ocsp/ocsp_asn.c
@@ -62,7 +62,7 @@
 ASN1_SEQUENCE(OCSP_SIGNATURE) = {
         ASN1_SIMPLE(OCSP_SIGNATURE, signatureAlgorithm, X509_ALGOR),
         ASN1_SIMPLE(OCSP_SIGNATURE, signature, ASN1_BIT_STRING),
-        ASN1_EXP_SEQUENCE_OF(OCSP_SIGNATURE, certs, X509, 0)
+        ASN1_EXP_SEQUENCE_OF_OPT(OCSP_SIGNATURE, certs, X509, 0)
 } ASN1_SEQUENCE_END(OCSP_SIGNATURE)
 
 IMPLEMENT_ASN1_FUNCTIONS(OCSP_SIGNATURE)