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-rw-r--r--packages/0x.js/src/0x.ts2
1 files changed, 1 insertions, 1 deletions
diff --git a/packages/0x.js/src/0x.ts b/packages/0x.js/src/0x.ts
index 5d9a03719..1d33eb7ca 100644
--- a/packages/0x.js/src/0x.ts
+++ b/packages/0x.js/src/0x.ts
@@ -61,7 +61,7 @@ export class ZeroEx {
* ERC721 proxy smart contract.
*/
public erc721Proxy: ERC721ProxyWrapper;
- private _contractWrappers: ContractWrappers;
+ private readonly _contractWrappers: ContractWrappers;
/**
* Generates a pseudo-random 256-bit salt.
* The salt can be included in a 0x order, ensuring that the order generates a unique orderHash