diff --git a/lib/batch/control.js b/lib/batch/control.js
index b926551..aaf5b3f 100644
--- a/lib/batch/control.js
+++ b/lib/batch/control.js
@@ -60,7 +60,7 @@ module.exports = {
 		width: 10,
 		position: 7,
 		required: true,
-		type: 'numeric'
+		type: 'alphanumeric'
 	},
 
 	messageAuthenticationCode: {
diff --git a/lib/batch/header.js b/lib/batch/header.js
index f1d706b..ca21045 100644
--- a/lib/batch/header.js
+++ b/lib/batch/header.js
@@ -41,7 +41,7 @@ module.exports = {
 		width: 10,
 		position: 5,
 		required: true,
-		type: 'numeric',
+		type: 'alphanumeric',
 		value: ''
 	},
 
diff --git a/lib/batch/index.js b/lib/batch/index.js
index bfa0eca..0b8444f 100644
--- a/lib/batch/index.js
+++ b/lib/batch/index.js
@@ -13,7 +13,7 @@ function Batch(options) {
 
 	// Allow the batch header/control defaults to be overriden if provided
 	this.header = options.header ? _.merge(options.header, require('./header'), _.defaults) : _.cloneDeep(require('./header'));
-	this.control = options.control ? _.merge(options.header, require('./control'), _.defaults) : _.cloneDeep(require('./control'));
+	this.control = options.control ? _.merge(options.control, require('./control'), _.defaults) : _.cloneDeep(require('./control'));
 
 	// Configure high-level overrides (these override the low-level settings if provided)
 	utils.overrideLowLevel(highLevelHeaderOverrides, options, this);