diff --git a/packages/abstract-provider/src.ts/index.ts b/packages/abstract-provider/src.ts/index.ts
index 4c63eb7e4..402f331e8 100644
--- a/packages/abstract-provider/src.ts/index.ts
+++ b/packages/abstract-provider/src.ts/index.ts
@@ -120,7 +120,7 @@ export interface Filter extends EventFilter {
 }
 
 export interface FilterByBlockHash extends EventFilter {
-    blockhash?: string;
+    blockHash?: string;
 }
 
 //export type CallTransactionable = {
@@ -138,20 +138,20 @@ export abstract class ForkEvent extends Description {
 }
 
 export class BlockForkEvent extends ForkEvent {
-    readonly blockhash: string;
+    readonly blockHash: string;
 
     readonly _isBlockForkEvent?: boolean;
 
-    constructor(blockhash: string, expiry?: number) {
-        if (!isHexString(blockhash, 32)) {
-            logger.throwArgumentError("invalid blockhash", "blockhash", blockhash);
+    constructor(blockHash: string, expiry?: number) {
+        if (!isHexString(blockHash, 32)) {
+            logger.throwArgumentError("invalid blockHash", "blockHash", blockHash);
         }
 
         super({
             _isForkEvent: true,
             _isBlockForkEvent: true,
             expiry: (expiry || 0),
-            blockHash: blockhash
+            blockHash: blockHash
         });
     }
 }