diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 2b23aa013..f2ffc1a3d 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -400,8 +400,6 @@ Unless otherwise indicated, code appearing in `this style` is to be interpreted
 {
     ## Header ##
     'slot': 'uint64',
-    # Skip list of ancestor beacon block hashes
-    # i'th item is the most recent ancestor whose slot is a multiple of 2**i for i = 0, ..., 31
     'parent_root': 'hash32',
     'state_root': 'hash32',
     'randao_reveal': 'hash32',