diff --git a/README.md b/README.md
index 5ac6988..315ab21 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ translator.toWords(1234)
 ##Now available locales
  - id_ID (0...999999999)
  - de_DE	(0...999999999)
- - en_US	(0...999999999)
+ - en_US	(-999999999...999999999)
  - cs_CZ	(0...999999999)
  
 **You can implement your locale vocabulary**. For additional locale send pull request with locale file + tests.
diff --git a/src/locales/en_US.js b/src/locales/en_US.js
index 692cc8d..6c81420 100644
--- a/src/locales/en_US.js
+++ b/src/locales/en_US.js
@@ -16,7 +16,8 @@ T2W.EN_US.DICTIONARY = {
 	tens		:[ "", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety" ],
 	hundred		:"hundred",
 	radix		:["", "thousand", "million"],
-	delimiters	:["-", "and"]
+	delimiters	:["-", "and"],
+	signs		:["minus"]
 };
 
 /**
@@ -40,7 +41,7 @@ T2W.EN_US.MAX_NUMBERS = 9;
  * @param {number} index
  * @return {string}
  */
-T2W.EN_US.prototype.translate = function( numbers ) {	
+T2W.EN_US.prototype.translate = function( numbers, sign ) {	
 	
 	// Check max value	
 	if(numbers.length * T2W.EN_US.TOKEN_LENGTH > T2W.EN_US.MAX_NUMBERS){
@@ -60,6 +61,8 @@ T2W.EN_US.prototype.translate = function( numbers ) {
 		words.unshift( this._getTrio( this.tokenize( numbers[idx], 1 ), idx, max));	
 	}
 	
+	if(sign === false) words.unshift( T2W.EN_US.DICTIONARY.signs[0] + " " );
+	
 	return words.join("");								
 };
 
diff --git a/src/numbers2words.js b/src/numbers2words.js
index ed45cb7..1dbae08 100644
--- a/src/numbers2words.js
+++ b/src/numbers2words.js
@@ -86,7 +86,7 @@ T2W.prototype.toWords = function( number ){
 		};
 	}
 				
-	return this.translate( this.tokenize(number, this._tokenLength));
+	return this.translate( this.tokenize(number, this._tokenLength), Math.sign(number) > 0);
 };
 
 /**