diff --git a/include/mbedtls/pem.h b/include/mbedtls/pem.h
index b47e0e9..ef94529 100644
--- a/include/mbedtls/pem.h
+++ b/include/mbedtls/pem.h
@@ -21,8 +21,8 @@
  *  with this program; if not, write to the Free Software Foundation, Inc.,
  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
-#ifndef POLARSSL_PEM_H
-#define POLARSSL_PEM_H
+#ifndef MBEDTLS_PEM_H
+#define MBEDTLS_PEM_H
 
 #include <stddef.h>
 
@@ -32,22 +32,22 @@
  * PEM data.
  * \{
  */
-#define POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT          -0x1080  /**< No PEM header or footer found. */
-#define POLARSSL_ERR_PEM_INVALID_DATA                      -0x1100  /**< PEM string is not as expected. */
-#define POLARSSL_ERR_PEM_MALLOC_FAILED                     -0x1180  /**< Failed to allocate memory. */
-#define POLARSSL_ERR_PEM_INVALID_ENC_IV                    -0x1200  /**< RSA IV is not in hex-format. */
-#define POLARSSL_ERR_PEM_UNKNOWN_ENC_ALG                   -0x1280  /**< Unsupported key encryption algorithm. */
-#define POLARSSL_ERR_PEM_PASSWORD_REQUIRED                 -0x1300  /**< Private key password can't be empty. */
-#define POLARSSL_ERR_PEM_PASSWORD_MISMATCH                 -0x1380  /**< Given private key password does not allow for correct decryption. */
-#define POLARSSL_ERR_PEM_FEATURE_UNAVAILABLE               -0x1400  /**< Unavailable feature, e.g. hashing/encryption combination. */
-#define POLARSSL_ERR_PEM_BAD_INPUT_DATA                    -0x1480  /**< Bad input parameters to function. */
+#define MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT          -0x1080  /**< No PEM header or footer found. */
+#define MBEDTLS_ERR_PEM_INVALID_DATA                      -0x1100  /**< PEM string is not as expected. */
+#define MBEDTLS_ERR_PEM_MALLOC_FAILED                     -0x1180  /**< Failed to allocate memory. */
+#define MBEDTLS_ERR_PEM_INVALID_ENC_IV                    -0x1200  /**< RSA IV is not in hex-format. */
+#define MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG                   -0x1280  /**< Unsupported key encryption algorithm. */
+#define MBEDTLS_ERR_PEM_PASSWORD_REQUIRED                 -0x1300  /**< Private key password can't be empty. */
+#define MBEDTLS_ERR_PEM_PASSWORD_MISMATCH                 -0x1380  /**< Given private key password does not allow for correct decryption. */
+#define MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE               -0x1400  /**< Unavailable feature, e.g. hashing/encryption combination. */
+#define MBEDTLS_ERR_PEM_BAD_INPUT_DATA                    -0x1480  /**< Bad input parameters to function. */
 /* \} name */
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#if defined(POLARSSL_PEM_PARSE_C)
+#if defined(MBEDTLS_PEM_PARSE_C)
 /**
  * \brief       PEM context structure
  */
@@ -57,14 +57,14 @@
     size_t buflen;          /*!< length of the buffer                */
     unsigned char *info;    /*!< buffer for extra header information */
 }
-pem_context;
+mbedtls_pem_context;
 
 /**
  * \brief       PEM context setup
  *
  * \param ctx   context to be initialized
  */
-void pem_init( pem_context *ctx );
+void mbedtls_pem_init( mbedtls_pem_context *ctx );
 
 /**
  * \brief       Read a buffer for PEM information and store the resulting
@@ -78,8 +78,8 @@
  * \param pwdlen    length of password
  * \param use_len   destination for total length used (set after header is
  *                  correctly read, so unless you get
- *                  POLARSSL_ERR_PEM_BAD_INPUT_DATA or
- *                  POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT, use_len is
+ *                  MBEDTLS_ERR_PEM_BAD_INPUT_DATA or
+ *                  MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT, use_len is
  *                  the length to skip)
  *
  * \note            Attempts to check password correctness by verifying if
@@ -88,7 +88,7 @@
  *
  * \return          0 on success, or a specific PEM error code
  */
-int pem_read_buffer( pem_context *ctx, const char *header, const char *footer,
+int mbedtls_pem_read_buffer( mbedtls_pem_context *ctx, const char *header, const char *footer,
                      const unsigned char *data,
                      const unsigned char *pwd,
                      size_t pwdlen, size_t *use_len );
@@ -98,10 +98,10 @@
  *
  * \param ctx   context to be freed
  */
-void pem_free( pem_context *ctx );
-#endif /* POLARSSL_PEM_PARSE_C */
+void mbedtls_pem_free( mbedtls_pem_context *ctx );
+#endif /* MBEDTLS_PEM_PARSE_C */
 
-#if defined(POLARSSL_PEM_WRITE_C)
+#if defined(MBEDTLS_PEM_WRITE_C)
 /**
  * \brief           Write a buffer of PEM information from a DER encoded
  *                  buffer.
@@ -115,13 +115,13 @@
  * \param olen      total length written / required (if buf_len is not enough)
  *
  * \return          0 on success, or a specific PEM or BASE64 error code. On
- *                  POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL olen is the required
+ *                  MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL olen is the required
  *                  size.
  */
-int pem_write_buffer( const char *header, const char *footer,
+int mbedtls_pem_write_buffer( const char *header, const char *footer,
                       const unsigned char *der_data, size_t der_len,
                       unsigned char *buf, size_t buf_len, size_t *olen );
-#endif /* POLARSSL_PEM_WRITE_C */
+#endif /* MBEDTLS_PEM_WRITE_C */
 
 #ifdef __cplusplus
 }