diff --git a/include/mbedtls/pem.h b/include/mbedtls/pem.h
index 4769bec..dfb4ff2 100644
--- a/include/mbedtls/pem.h
+++ b/include/mbedtls/pem.h
@@ -36,15 +36,24 @@
  * PEM data.
  * \{
  */
-#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_ALLOC_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. */
+/** No PEM header or footer found. */
+#define MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT          -0x1080
+/** PEM string is not as expected. */
+#define MBEDTLS_ERR_PEM_INVALID_DATA                      -0x1100
+/** Failed to allocate memory. */
+#define MBEDTLS_ERR_PEM_ALLOC_FAILED                      -0x1180
+/** RSA IV is not in hex-format. */
+#define MBEDTLS_ERR_PEM_INVALID_ENC_IV                    -0x1200
+/** Unsupported key encryption algorithm. */
+#define MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG                   -0x1280
+/** Private key password can't be empty. */
+#define MBEDTLS_ERR_PEM_PASSWORD_REQUIRED                 -0x1300
+/** Given private key password does not allow for correct decryption. */
+#define MBEDTLS_ERR_PEM_PASSWORD_MISMATCH                 -0x1380
+/** Unavailable feature, e.g. hashing/encryption combination. */
+#define MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE               -0x1400
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_PEM_BAD_INPUT_DATA                    -0x1480
 /* \} name */
 
 #ifdef __cplusplus