diff --git a/include/mbedtls/des.h b/include/mbedtls/des.h
index 1c80b53..5debba1 100644
--- a/include/mbedtls/des.h
+++ b/include/mbedtls/des.h
@@ -35,6 +35,7 @@
 #include MBEDTLS_CONFIG_FILE
 #endif
 
+#include "mbedtls/platform_util.h"
 #include <stddef.h>
 #include <stdint.h>
 
@@ -91,6 +92,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 void mbedtls_des_init( mbedtls_des_context *ctx );
 
 /**
@@ -102,6 +104,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 void mbedtls_des_free( mbedtls_des_context *ctx );
 
 /**
@@ -109,6 +112,7 @@
  *
  * \param ctx      DES3 context to be initialized
  */
+MBEDTLS_DEPRECATED
 void mbedtls_des3_init( mbedtls_des3_context *ctx );
 
 /**
@@ -116,6 +120,7 @@
  *
  * \param ctx      DES3 context to be cleared
  */
+MBEDTLS_DEPRECATED
 void mbedtls_des3_free( mbedtls_des3_context *ctx );
 
 /**
@@ -130,6 +135,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 void mbedtls_des_key_set_parity( unsigned char key[MBEDTLS_DES_KEY_SIZE] );
 
 /**
@@ -146,6 +152,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des_key_check_key_parity( const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
 
 /**
@@ -159,6 +166,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des_key_check_weak( const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
 
 /**
@@ -173,6 +181,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des_setkey_enc( mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
 
 /**
@@ -187,6 +196,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des_setkey_dec( mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
 
 /**
@@ -197,6 +207,7 @@
  *
  * \return         0
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des3_set2key_enc( mbedtls_des3_context *ctx,
                       const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2] );
 
@@ -208,6 +219,7 @@
  *
  * \return         0
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des3_set2key_dec( mbedtls_des3_context *ctx,
                       const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2] );
 
@@ -219,6 +231,7 @@
  *
  * \return         0
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des3_set3key_enc( mbedtls_des3_context *ctx,
                       const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3] );
 
@@ -230,6 +243,7 @@
  *
  * \return         0
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des3_set3key_dec( mbedtls_des3_context *ctx,
                       const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3] );
 
@@ -246,6 +260,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des_crypt_ecb( mbedtls_des_context *ctx,
                     const unsigned char input[8],
                     unsigned char output[8] );
@@ -273,6 +288,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des_crypt_cbc( mbedtls_des_context *ctx,
                     int mode,
                     size_t length,
@@ -290,6 +306,7 @@
  *
  * \return         0 if successful
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des3_crypt_ecb( mbedtls_des3_context *ctx,
                      const unsigned char input[8],
                      unsigned char output[8] );
@@ -315,6 +332,7 @@
  *
  * \return         0 if successful, or MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des3_crypt_cbc( mbedtls_des3_context *ctx,
                      int mode,
                      size_t length,
@@ -335,6 +353,7 @@
  *                 security risk. We recommend considering stronger ciphers
  *                 instead.
  */
+MBEDTLS_DEPRECATED
 void mbedtls_des_setkey( uint32_t SK[32],
                          const unsigned char key[MBEDTLS_DES_KEY_SIZE] );
 
@@ -345,6 +364,7 @@
  *
  * \return         0 if successful, or 1 if the test failed
  */
+MBEDTLS_DEPRECATED
 int mbedtls_des_self_test( int verbose );
 
 #endif /* MBEDTLS_SELF_TEST */