diff --git a/EIPS/eip-1884.md b/EIPS/eip-1884.md
index 1a1f64da..19faa357 100644
--- a/EIPS/eip-1884.md
+++ b/EIPS/eip-1884.md
@@ -7,6 +7,7 @@ category: Core
 discussions-to: https://ethereum-magicians.org/t/opcode-repricing/3024
 status: Draft
 created: 2019-03-28
+requires: 150
 ---
 
 
@@ -33,8 +34,8 @@ If operations are well-balanced, we can maximise the block gaslimit and have a m
 
 At block `N`, 
 
-- The `SLOAD` operation changes from `200` to `800` gas,
-- The `BALANCE` operation changes from `400` to `700` gas,
+- The `SLOAD` (`0x54`) operation changes from `200` to `800` gas,
+- The `BALANCE` (`0x31`) operation changes from `400` to `700` gas,
 - A new opcode, `SELFBALANCE` is introduced at `0x46`. 
   - `SELFBALANCE` pops `0` arguments off the stack, 
   - `SELFBALANCE` pushes the `balance` of the current address to the stack,
@@ -47,7 +48,7 @@ Here are two charts, taken from a full sync using Geth. The execution time was m
 ![bars1](../assets/eip-1884/run3.total-bars-5.png) 
 ![bars2](../assets/eip-1884/run3.total-bars-6.png) 
 
-Note: It can also be seen that the `SLOAD` moves towards the top position. The `GASPRICE` opcode has position one which I believe can be optimized away within the client -- which is not the case with `SLOAD`/`BALANCE`.
+Note: It can also be seen that the `SLOAD` moves towards the top position. The `GASPRICE` (`0x3a`) opcode has position one which I believe can be optimized away within the client -- which is not the case with `SLOAD`/`BALANCE`.
 
 Here is another chart, showing a full sync with Geth. It represents the blocks `0` to `5.7M`, and highlights what the block processing time is spent on.