diff --git a/src/openvpn/ssl_verify_backend.h b/src/openvpn/ssl_verify_backend.h
index 3b798811242..d402b1f2404 100644
--- a/src/openvpn/ssl_verify_backend.h
+++ b/src/openvpn/ssl_verify_backend.h
@@ -249,17 +249,6 @@ result_t x509_verify_cert_ku(openvpn_x509_cert_t *x509, const unsigned *const ex
  */
 result_t x509_verify_cert_eku(openvpn_x509_cert_t *x509, const char *const expected_oid);
 
-/*
- * Store the given certificate in pem format in a temporary file in tmp_dir
- *
- * @param cert          Certificate to store
- * @param tmp_dir       Temporary directory to store the directory
- * @param gc            gc_arena to store temporary objects in
- *
- *
- */
-result_t x509_write_pem(FILE *peercert_file, openvpn_x509_cert_t *peercert);
-
 /**
  * Return true iff a CRL is configured, but is not loaded.  This can be caused
  * by e.g. a CRL parsing error, a missing CRL file or CRL file permission
diff --git a/src/openvpn/ssl_verify_mbedtls.c b/src/openvpn/ssl_verify_mbedtls.c
index ce21324649a..56121394f08 100644
--- a/src/openvpn/ssl_verify_mbedtls.c
+++ b/src/openvpn/ssl_verify_mbedtls.c
@@ -536,13 +536,6 @@ x509_verify_cert_eku(mbedtls_x509_crt *cert, const char *const expected_oid)
     return fFound;
 }
 
-result_t
-x509_write_pem(FILE *peercert_file, mbedtls_x509_crt *peercert)
-{
-    msg(M_WARN, "mbed TLS does not support writing peer certificate in PEM format");
-    return FAILURE;
-}
-
 bool
 tls_verify_crl_missing(const struct tls_options *opt)
 {
diff --git a/src/openvpn/ssl_verify_openssl.c b/src/openvpn/ssl_verify_openssl.c
index 3194c232a74..5afffc1fdac 100644
--- a/src/openvpn/ssl_verify_openssl.c
+++ b/src/openvpn/ssl_verify_openssl.c
@@ -762,17 +762,6 @@ x509_verify_cert_eku(X509 *x509, const char *const expected_oid)
     return fFound;
 }
 
-result_t
-x509_write_pem(FILE *peercert_file, X509 *peercert)
-{
-    if (PEM_write_X509(peercert_file, peercert) < 0)
-    {
-        msg(M_NONFATAL, "Failed to write peer certificate in PEM format");
-        return FAILURE;
-    }
-    return SUCCESS;
-}
-
 bool
 tls_verify_crl_missing(const struct tls_options *opt)
 {