diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 9305259f0..796488e82 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -24,8 +24,8 @@
         - [Deposits](#deposits)
             - [`DepositParametersRecord`](#depositparametersrecord)
         - [Beacon chain blocks](#beacon-chain-blocks)
-            - [`BeaconBlockHeader`](#beaconblock)
-            - [`BeaconBlockBody`](#beaconblock)
+            - [`BeaconBlockHeader`](#beaconblockheader)
+            - [`BeaconBlockBody`](#beaconblockbody)
             - [`BeaconBlock`](#beaconblock)
             - [`AttestationRecord`](#attestationrecord)
             - [`AttestationData`](#attestationdata)