diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index e7f42e5..2e1b982 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -3365,7 +3365,8 @@
  * Note: A value of \c 1 means that no padding will be used
  *       for outgoing records.
  *
- * The value MUST be a power of 2.
+ * Note: On systems lacking division instructions,
+ *       a power of two should be preferred.
  *
  */
 //#define MBEDTLS_SSL_CID_PADDING_GRANULARITY 16