diff --git a/include/mbedtls/cipher.h b/include/mbedtls/cipher.h
index aa155d7..2a2b64a 100644
--- a/include/mbedtls/cipher.h
+++ b/include/mbedtls/cipher.h
@@ -427,7 +427,7 @@
                                                              const mbedtls_cipher_mode_t mode);
 
 /**
- * \brief               This function initializes a \p cipher_context as NONE.
+ * \brief               This function initializes a \p ctx as NONE.
  *
  * \param ctx           The context to be initialized. This must not be \c NULL.
  */
@@ -602,7 +602,7 @@
  * \param ctx           The context of the cipher. This must be initialized.
  *
  * \return              The key length of the cipher in bits.
- * \return              #MBEDTLS_KEY_LENGTH_NONE if ctx \p has not been
+ * \return              #MBEDTLS_KEY_LENGTH_NONE if \p ctx has not been
  *                      initialized.
  */
 static inline int mbedtls_cipher_get_key_bitlen(
@@ -779,7 +779,7 @@
  * \param ctx           The generic cipher context. This must be initialized and
  *                      bound to a key.
  * \param output        The buffer to write data to. This needs to be a writable
- *                      buffer of at least \p block_size Bytes.
+ *                      buffer of at least \c block_size Bytes.
  * \param olen          The length of the data written to the \p output buffer.
  *                      This may not be \c NULL.
  *