diff --git a/include/mbedtls/error.h b/include/mbedtls/error.h
index 6b82d4f..95415dc 100644
--- a/include/mbedtls/error.h
+++ b/include/mbedtls/error.h
@@ -80,6 +80,7 @@
  * CHACHA20  3                  0x0051-0x0055
  * POLY1305  3                  0x0057-0x005B
  * CHACHAPOLY 2 0x0054-0x0056
+ * PLATFORM  2 0x0080-0x0082
  *
  * High-level module nr (3 bits - 0x0...-0x7...)
  * Name      ID  Nr of Errors
diff --git a/include/mbedtls/platform.h b/include/mbedtls/platform.h
index a40a64f..a1cd689 100644
--- a/include/mbedtls/platform.h
+++ b/include/mbedtls/platform.h
@@ -43,6 +43,9 @@
 #include "platform_time.h"
 #endif
 
+#define MBEDTLS_ERR_PLATFORM_INVALID_DATA    -0x0080 /**< Bad input parameters to the platform function. */
+#define MBEDTLS_ERR_PLATFORM_HW_FAILED       -0x0082 /**< Hardware platform function failed. */
+
 #ifdef __cplusplus
 extern "C" {
 #endif