--- CBOR-XS/XS.xs	2013/11/28 11:36:53	1.30
+++ CBOR-XS/XS.xs	2013/11/28 11:43:26	1.31
@@ -191,9 +191,9 @@
 {
    need (enc, 9);
 
-   if (len < 24)
+   if (ecb_expect_true (len < 24))
       *enc->cur++ = major | len;
-   else if (len <= 0xff)
+   else if (ecb_expect_true (len <= 0xff))
      {
        *enc->cur++ = major | 24;
        *enc->cur++ = len;