diff --git a/include/mbedtls/hmac_drbg.h b/include/mbedtls/hmac_drbg.h
index 1ab3422..2f81158 100644
--- a/include/mbedtls/hmac_drbg.h
+++ b/include/mbedtls/hmac_drbg.h
@@ -25,6 +25,7 @@
  */
 #ifndef MBEDTLS_HMAC_DRBG_H
 #define MBEDTLS_HMAC_DRBG_H
+#include "mbedtls/private_access.h"
 
 #if !defined(MBEDTLS_CONFIG_FILE)
 #include "mbedtls/config.h"
@@ -86,19 +87,19 @@
 {
     /* Working state: the key K is not stored explicitly,
      * but is implied by the HMAC context */
-    mbedtls_md_context_t md_ctx;                    /*!< HMAC context (inc. K)  */
-    unsigned char V[MBEDTLS_MD_MAX_SIZE];  /*!< V in the spec          */
-    int reseed_counter;                     /*!< reseed counter         */
+    mbedtls_md_context_t MBEDTLS_PRIVATE(md_ctx);                    /*!< HMAC context (inc. K)  */
+    unsigned char MBEDTLS_PRIVATE(V)[MBEDTLS_MD_MAX_SIZE];  /*!< V in the spec          */
+    int MBEDTLS_PRIVATE(reseed_counter);                     /*!< reseed counter         */
 
     /* Administrative state */
-    size_t entropy_len;         /*!< entropy bytes grabbed on each (re)seed */
-    int prediction_resistance;  /*!< enable prediction resistance (Automatic
+    size_t MBEDTLS_PRIVATE(entropy_len);         /*!< entropy bytes grabbed on each (re)seed */
+    int MBEDTLS_PRIVATE(prediction_resistance);  /*!< enable prediction resistance (Automatic
                                      reseed before every random generation) */
-    int reseed_interval;        /*!< reseed interval   */
+    int MBEDTLS_PRIVATE(reseed_interval);        /*!< reseed interval   */
 
     /* Callbacks */
-    int (*f_entropy)(void *, unsigned char *, size_t); /*!< entropy function */
-    void *p_entropy;            /*!< context for the entropy function        */
+    int (*MBEDTLS_PRIVATE(f_entropy))(void *, unsigned char *, size_t); /*!< entropy function */
+    void *MBEDTLS_PRIVATE(p_entropy);            /*!< context for the entropy function        */
 
 #if defined(MBEDTLS_THREADING_C)
     /* Invariant: the mutex is initialized if and only if
@@ -109,7 +110,7 @@
      * Note that this invariant may change without notice. Do not rely on it
      * and do not access the mutex directly in application code.
      */
-    mbedtls_threading_mutex_t mutex;
+    mbedtls_threading_mutex_t MBEDTLS_PRIVATE(mutex);
 #endif
 } mbedtls_hmac_drbg_context;