diff --git a/features.js b/features.js
index 48ba9d0..07772e9 100755
--- a/features.js
+++ b/features.js
@@ -29,6 +29,9 @@ function(data){
 		return this.message
 	}
 }
+FeatureLinearizationError.prototype = Object.create(new Error)
+FeatureLinearizationError.prototype.constructor = FeatureLinearizationError
+
 
 
 
diff --git a/package.json b/package.json
index 3d2122a..18a480a 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ig-features",
-  "version": "3.1.7",
+  "version": "3.1.8",
   "description": "",
   "main": "features.js",
   "scripts": {