diff --git a/include/mbedtls/sha256.h b/include/mbedtls/sha256.h
index 1100869..22c2c7d 100644
--- a/include/mbedtls/sha256.h
+++ b/include/mbedtls/sha256.h
@@ -128,7 +128,7 @@
  *                 and have a hash operation started.
  * \param output   The SHA-224 or SHA-256 checksum result.
  *                 This must be a writable buffer of length \c 32 bytes
- *                 for SHA-256, 28 bytes for SHA-224.
+ *                 for SHA-256, \c 28 bytes for SHA-224.
  *
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
@@ -166,7 +166,7 @@
  * \param ilen     The length of the input data in Bytes.
  * \param output   The SHA-224 or SHA-256 checksum result.
  *                 This must be a writable buffer of length \c 32 bytes
- *                 for SHA-256, 28 bytes for SHA-224.
+ *                 for SHA-256, \c 28 bytes for SHA-224.
  * \param is224    Determines which function to use. This must be
  *                 either \c 0 for SHA-256, or \c 1 for SHA-224.
  */