diff --git a/include/mbedtls/x509_crt.h b/include/mbedtls/x509_crt.h
index 62c3c2e..0d55eec 100644
--- a/include/mbedtls/x509_crt.h
+++ b/include/mbedtls/x509_crt.h
@@ -339,6 +339,7 @@
 int mbedtls_x509_crt_parse_path( mbedtls_x509_crt *chain, const char *path );
 #endif /* MBEDTLS_FS_IO */
 
+#if defined(MBEDTLS_X509_INFO)
 /**
  * \brief          Returns an informational string about the
  *                 certificate.
@@ -353,7 +354,9 @@
  */
 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.
@@ -368,6 +371,7 @@
  */
 int mbedtls_x509_crt_verify_info( char *buf, size_t size, const char *prefix,
                           uint32_t flags );
+#endif
 
 /**
  * \brief          Verify the certificate signature