diff --git a/include/mbedtls/error.h b/include/mbedtls/error.h
index 0c38889..5f6e8ef 100644
--- a/include/mbedtls/error.h
+++ b/include/mbedtls/error.h
@@ -75,7 +75,7 @@
  * MD5       1                  0x002F-0x002F
  * RIPEMD160 1                  0x0031-0x0031
  * SHA1      1                  0x0035-0x0035
- * SHA256    1                  0x0037-0x0037
+ * SHA256    1                  0x0037-0x0037 0x0074-0x0074
  * SHA512    1                  0x0039-0x0039
  * CHACHA20  3                  0x0051-0x0055
  * POLY1305  3                  0x0057-0x005B
diff --git a/include/mbedtls/sha256.h b/include/mbedtls/sha256.h
index 47a31e8..bd323dd 100644
--- a/include/mbedtls/sha256.h
+++ b/include/mbedtls/sha256.h
@@ -38,6 +38,7 @@
 
 /* MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED is deprecated and should not be used. */
 #define MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED                -0x0037  /**< SHA-256 hardware accelerator failed */
+#define MBEDTLS_ERR_SHA256_BAD_INPUT_DATA                 -0x0074  /**< Invalid input data. */
 
 #ifdef __cplusplus
 extern "C" {