diff --git a/include/mbedtls/cipher.h b/include/mbedtls/cipher.h
index ee9c8e6e95..0dfd6eed3f 100644
--- a/include/mbedtls/cipher.h
+++ b/include/mbedtls/cipher.h
@@ -62,7 +62,7 @@
 #define MBEDTLS_ERR_CIPHER_AUTH_FAILED          -0x6300  /**< Authentication failed (for AEAD modes). */
 #define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT      -0x6380  /**< The context is invalid. For example, because it was freed. */
 
-// TODO [TR] for #4029: can't remove it because it's still used in the code.
+// TODO [TR] for #4283: can't remove it because it's still used in the code.
 // see other TODOS
 /* MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED is deprecated and should not be used. */
 #define MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED      -0x6400  /**< Cipher hardware accelerator failed. */
diff --git a/include/mbedtls/md.h b/include/mbedtls/md.h
index 882ff74754..38b89c8c4c 100644
--- a/include/mbedtls/md.h
+++ b/include/mbedtls/md.h
@@ -38,7 +38,7 @@
 #define MBEDTLS_ERR_MD_ALLOC_FAILED                       -0x5180  /**< Failed to allocate memory. */
 #define MBEDTLS_ERR_MD_FILE_IO_ERROR                      -0x5200  /**< Opening or reading of file failed. */
 
-// TODO [TR] for #4029: can't remove it because it's still used in the code.
+// TODO [TR] for #4283: can't remove it because it's still used in the code.
 // see other TODOs
 /* MBEDTLS_ERR_MD_HW_ACCEL_FAILED is deprecated and should not be used. */
 #define MBEDTLS_ERR_MD_HW_ACCEL_FAILED                    -0x5280  /**< MD hardware accelerator failed. */
diff --git a/include/mbedtls/pk.h b/include/mbedtls/pk.h
index f6ca04c869..7e8e3941bf 100644
--- a/include/mbedtls/pk.h
+++ b/include/mbedtls/pk.h
@@ -67,7 +67,7 @@
 #define MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE -0x3980  /**< Unavailable feature, e.g. RSA disabled for RSA key. */
 #define MBEDTLS_ERR_PK_SIG_LEN_MISMATCH    -0x3900  /**< The buffer contains a valid signature followed by more data. */
 
-// TODO [TR] for #4029 can't remove it because it's still used in the code.
+// TODO [TR] for #4283 can't remove it because it's still used in the code.
 // see the other TODOs
 /* MBEDTLS_ERR_PK_HW_ACCEL_FAILED is deprecated and should not be used. */
 #define MBEDTLS_ERR_PK_HW_ACCEL_FAILED     -0x3880  /**< PK hardware accelerator failed. */