diff --git a/internal/web3ext/web3ext.go b/internal/web3ext/web3ext.go
index ea4abef1f6..a2fc3b5a90 100644
--- a/internal/web3ext/web3ext.go
+++ b/internal/web3ext/web3ext.go
@@ -641,6 +641,8 @@ web3._extend({
 		new web3._extend.Method({
 			name: 'start',
 			call: 'miner_start',
+			params: 1,
+			inputFormatter: [null]
 		}),
 		new web3._extend.Method({
 			name: 'stop',