diff --git a/include/mbedtls/x509_crt.h b/include/mbedtls/x509_crt.h
index 8e389f8..fc3ea8e 100644
--- a/include/mbedtls/x509_crt.h
+++ b/include/mbedtls/x509_crt.h
@@ -509,6 +509,8 @@
  */
 int mbedtls_x509_parse_subject_alt_name( const mbedtls_x509_buf *san_buf,
                                          mbedtls_x509_subject_alternative_name *san );
+
+#if defined(MBEDTLS_X509_INFO)
 /**
  * \brief          Returns an informational string about the
  *                 certificate.
@@ -523,7 +525,9 @@
  */
 int mbedtls_x509_crt_info( char *buf, size_t size, const char *prefix,
                    const mbedtls_x509_crt *crt );
+#endif
 
+#if defined(MBEDTLS_X509_INFO)
 /**
  * \brief          Returns an informational string about the
  *                 verification status of a certificate.
@@ -538,6 +542,7 @@
  */
 int mbedtls_x509_crt_verify_info( char *buf, size_t size, const char *prefix,
                           uint32_t flags );
+#endif
 
 /**
  * \brief          Verify a chain of certificates.