diff --git a/arbitrum-docs/launch-orbit-chain/how-tos/customize-precompile.mdx b/arbitrum-docs/launch-orbit-chain/how-tos/customize-precompile.mdx
index 4ec435874..efbb0751c 100644
--- a/arbitrum-docs/launch-orbit-chain/how-tos/customize-precompile.mdx
+++ b/arbitrum-docs/launch-orbit-chain/how-tos/customize-precompile.mdx
@@ -205,7 +205,7 @@ Now navigate to the [precompiles interface][precompile_interface_dir_link] direc
 event Hi(address caller);
 ```
 
-If you want to make the param in event as `index`, just add index to solidity interface as this:
+If you want to make the param in event as `index`, just add `index` to the Solidity interface:
 
 ```solidity
 event Hi(address indexed caller);