diff --git a/include/openssl/x509.h b/include/openssl/x509.h
index 9cc497a..b336e0f 100644
--- a/include/openssl/x509.h
+++ b/include/openssl/x509.h
@@ -1110,6 +1110,7 @@
 namespace bssl {
 
 BORINGSSL_MAKE_DELETER(NETSCAPE_SPKI, NETSCAPE_SPKI_free)
+BORINGSSL_MAKE_DELETER(RSA_PSS_PARAMS, RSA_PSS_PARAMS_free)
 BORINGSSL_MAKE_DELETER(X509, X509_free)
 BORINGSSL_MAKE_DELETER(X509_ALGOR, X509_ALGOR_free)
 BORINGSSL_MAKE_DELETER(X509_CRL, X509_CRL_free)