diff --git a/crypto/x509/x509_cmp.c b/crypto/x509/x509_cmp.c
index 1d8d2d7..f06eb13 100644
--- a/crypto/x509/x509_cmp.c
+++ b/crypto/x509/x509_cmp.c
@@ -38,6 +38,7 @@ unsigned long X509_issuer_and_serial_hash(X509 *a)
 
     if (ctx == NULL)
         goto err;
+    EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
     f = X509_NAME_oneline(a->cert_info.issuer, NULL, 0);
     if (f == NULL)
         goto err;