diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 1e51745..0588e0c 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -111,7 +111,7 @@
 /* Error space gap */
 /* Error space gap */
 /** Cache entry not found */
-#define MBEDTLS_ERR_SSL_CACHE_NOT_FOUND                   -0x7E80
+#define MBEDTLS_ERR_SSL_CACHE_ENTRY_NOT_FOUND             -0x7E80
 /** Memory allocation failed */
 #define MBEDTLS_ERR_SSL_ALLOC_FAILED                      -0x7F00
 /** Hardware acceleration function returned with error */
diff --git a/include/mbedtls/ssl_cache.h b/include/mbedtls/ssl_cache.h
index 9b7d8e6..7009827 100644
--- a/include/mbedtls/ssl_cache.h
+++ b/include/mbedtls/ssl_cache.h
@@ -104,7 +104,8 @@
  *                        associated with \p session_id, if present.
  *
  * \return                \c 0 on success.
- * \return                A negative error code on failure.
+ * \return                #MBEDTLS_ERR_SSL_CACHE_ENTRY_NOT_FOUND if there is
+ *                        no cache entry with specified session ID found.
  */
 int mbedtls_ssl_cache_get(void *data,
                           unsigned char const *session_id,