diff --git a/EIPS/eip-155.md b/EIPS/eip-155.md
index b33005e5..af9b9409 100644
--- a/EIPS/eip-155.md
+++ b/EIPS/eip-155.md
@@ -10,7 +10,7 @@ Created: 2016-10-14
 ```
 
 ### Parameters
-- `FORK_BLKNUM`: 2,675,000
+- `FORK_BLKNUM`: 2,675,000 ([Spurious Dragon](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-607.md))
 - `CHAIN_ID`: 1
 ### Specification