Fix documentation issues found by Clang
diff --git a/include/polarssl/pkcs12.h b/include/polarssl/pkcs12.h
index 9a45771..7bbf393 100644
--- a/include/polarssl/pkcs12.h
+++ b/include/polarssl/pkcs12.h
@@ -38,9 +38,9 @@
#define POLARSSL_ERR_PKCS12_PBE_INVALID_FORMAT -0x1E80 /**< PBE ASN.1 data not as expected. */
#define POLARSSL_ERR_PKCS12_PASSWORD_MISMATCH -0x1E00 /**< Given private key password does not allow for correct decryption. */
-#define PKCS12_DERIVE_KEY 1 /*< encryption/decryption key */
-#define PKCS12_DERIVE_IV 2 /*< initialization vector */
-#define PKCS12_DERIVE_MAC_KEY 3 /*< integrity / MAC key */
+#define PKCS12_DERIVE_KEY 1 /**< encryption/decryption key */
+#define PKCS12_DERIVE_IV 2 /**< initialization vector */
+#define PKCS12_DERIVE_MAC_KEY 3 /**< integrity / MAC key */
#define PKCS12_PBE_DECRYPT 0
#define PKCS12_PBE_ENCRYPT 1