diff --git a/dist/Long.js b/dist/Long.js
index cde012d..03afe1b 100644
--- a/dist/Long.js
+++ b/dist/Long.js
@@ -44,12 +44,18 @@
      * 
      * @exports Long
      * @class A Long class for representing a 64-bit two's-complement integer value.
-     * @param {number} low The low (signed) 32 bits of the long.
-     * @param {number} high The high (signed) 32 bits of the long.
+     * @param {number|!{low: number, high: number, unsigned: boolean}} low The low (signed) 32 bits of the long.
+     *  Optionally accepts a Long-like object as the first parameter.
+     * @param {number=} high The high (signed) 32 bits of the long.
      * @param {boolean=} unsigned Whether unsigned or not. Defaults to `false` (signed).
      * @constructor
      */
     var Long = function(low, high, unsigned) {
+        if (low && typeof low === 'object') {
+            high = low.high;
+            unsigned = low.unsigned;
+            low = low.low;
+        }
         
         /**
          * The low 32 bits as a signed value.
diff --git a/dist/Long.min.js b/dist/Long.min.js
index 2e5a578..4e01dc0 100644
--- a/dist/Long.min.js
+++ b/dist/Long.min.js
@@ -5,10 +5,10 @@
  see: https://github.com/dcodeIO/Long.js for details
 */
 var q=!0,r=!1;
-(function(s){function b(a,b,d){this.low=a|0;this.high=b|0;this.unsigned=!!d}var t={},u={};b.fromInt=function(a,c){var d;if(c){a>>>=0;if(0<=a&&256>a&&(d=u[a]))return d;d=new b(a,0>(a|0)?-1:0,q);0<=a&&256>a&&(u[a]=d)}else{a|=0;if(-128<=a&&128>a&&(d=t[a]))return d;d=new b(a,0>a?-1:0,r);-128<=a&&128>a&&(t[a]=d)}return d};b.fromNumber=function(a,c){c=!!c;return isNaN(a)||!isFinite(a)?b.ZERO:!c&&a<=-v?b.MIN_SIGNED_VALUE:c&&0>=a?b.MIN_UNSIGNED_VALUE:!c&&a+1>=v?b.MAX_SIGNED_VALUE:c&&a>=w?b.MAX_UNSIGNED_VALUE:0>
-a?b.fromNumber(-a,r).negate():new b(a%l|0,a/l|0,c)};b.fromBits=function(a,c,d){return new b(a,c,d)};b.from28Bits=function(a,c,d,e){return b.fromBits(a|c<<28,c>>>4|d<<24,e)};b.fromString=function(a,c,d){if(0==a.length)throw Error("number format error: empty string");if("NaN"===a||"Infinity"===a||"+Infinity"===a||"-Infinity"===a)return b.ZERO;"number"===typeof c&&(d=c,c=r);d=d||10;if(2>d||36<d)throw Error("radix out of range: "+d);if("-"==a.charAt(0))return b.fromString(a.substring(1),c,d).negate();
-if(0<=a.indexOf("-"))throw Error('number format error: interior "-" character: '+a);for(var e=b.fromNumber(Math.pow(d,8)),f=b.ZERO,g=0;g<a.length;g+=8){var k=Math.min(8,a.length-g),m=parseInt(a.substring(g,g+k),d);8>k?(k=b.fromNumber(Math.pow(d,k)),f=f.multiply(k).add(b.fromNumber(m))):(f=f.multiply(e),f=f.add(b.fromNumber(m)))}f.unsigned=c;return f};var l=4294967296,w=l*l,v=w/2,x=b.fromInt(16777216);b.ZERO=b.fromInt(0);b.UZERO=b.fromInt(0,q);b.ONE=b.fromInt(1);b.UONE=b.fromInt(1,q);b.NEG_ONE=b.fromInt(-1);
-b.MAX_SIGNED_VALUE=b.fromBits(-1,2147483647,r);b.MAX_UNSIGNED_VALUE=b.fromBits(-1,-1,q);b.MAX_VALUE=b.MAX_SIGNED_VALUE;b.MIN_SIGNED_VALUE=b.fromBits(0,-2147483648,r);b.MIN_UNSIGNED_VALUE=b.fromBits(0,0,q);b.MIN_VALUE=b.MIN_SIGNED_VALUE;b.prototype.toInt=function(){return this.unsigned?this.low>>>0:this.low};b.prototype.toNumber=function(){return this.unsigned?(this.high>>>0)*l+(this.low>>>0):this.high*l+(this.low>>>0)};b.prototype.toString=function(a){a=a||10;if(2>a||36<a)throw Error("radix out of range: "+
+(function(s){function b(a,b,d){a&&"object"===typeof a&&(b=a.high,d=a.unsigned,a=a.low);this.low=a|0;this.high=b|0;this.unsigned=!!d}var t={},u={};b.fromInt=function(a,c){var d;if(c){a>>>=0;if(0<=a&&256>a&&(d=u[a]))return d;d=new b(a,0>(a|0)?-1:0,q);0<=a&&256>a&&(u[a]=d)}else{a|=0;if(-128<=a&&128>a&&(d=t[a]))return d;d=new b(a,0>a?-1:0,r);-128<=a&&128>a&&(t[a]=d)}return d};b.fromNumber=function(a,c){c=!!c;return isNaN(a)||!isFinite(a)?b.ZERO:!c&&a<=-v?b.MIN_SIGNED_VALUE:c&&0>=a?b.MIN_UNSIGNED_VALUE:!c&&
+a+1>=v?b.MAX_SIGNED_VALUE:c&&a>=w?b.MAX_UNSIGNED_VALUE:0>a?b.fromNumber(-a,r).negate():new b(a%l|0,a/l|0,c)};b.fromBits=function(a,c,d){return new b(a,c,d)};b.from28Bits=function(a,c,d,e){return b.fromBits(a|c<<28,c>>>4|d<<24,e)};b.fromString=function(a,c,d){if(0==a.length)throw Error("number format error: empty string");if("NaN"===a||"Infinity"===a||"+Infinity"===a||"-Infinity"===a)return b.ZERO;"number"===typeof c&&(d=c,c=r);d=d||10;if(2>d||36<d)throw Error("radix out of range: "+d);if("-"==a.charAt(0))return b.fromString(a.substring(1),
+c,d).negate();if(0<=a.indexOf("-"))throw Error('number format error: interior "-" character: '+a);for(var e=b.fromNumber(Math.pow(d,8)),f=b.ZERO,g=0;g<a.length;g+=8){var k=Math.min(8,a.length-g),m=parseInt(a.substring(g,g+k),d);8>k?(k=b.fromNumber(Math.pow(d,k)),f=f.multiply(k).add(b.fromNumber(m))):(f=f.multiply(e),f=f.add(b.fromNumber(m)))}f.unsigned=c;return f};var l=4294967296,w=l*l,v=w/2,x=b.fromInt(16777216);b.ZERO=b.fromInt(0);b.UZERO=b.fromInt(0,q);b.ONE=b.fromInt(1);b.UONE=b.fromInt(1,q);
+b.NEG_ONE=b.fromInt(-1);b.MAX_SIGNED_VALUE=b.fromBits(-1,2147483647,r);b.MAX_UNSIGNED_VALUE=b.fromBits(-1,-1,q);b.MAX_VALUE=b.MAX_SIGNED_VALUE;b.MIN_SIGNED_VALUE=b.fromBits(0,-2147483648,r);b.MIN_UNSIGNED_VALUE=b.fromBits(0,0,q);b.MIN_VALUE=b.MIN_SIGNED_VALUE;b.prototype.toInt=function(){return this.unsigned?this.low>>>0:this.low};b.prototype.toNumber=function(){return this.unsigned?(this.high>>>0)*l+(this.low>>>0):this.high*l+(this.low>>>0)};b.prototype.toString=function(a){a=a||10;if(2>a||36<a)throw Error("radix out of range: "+
 a);if(this.isZero())return"0";var c;if(this.isNegative()){if(this.equals(b.MIN_SIGNED_VALUE)){c=b.fromNumber(a);var d=this.div(c);c=d.multiply(c).subtract(this);return d.toString(a)+c.toInt().toString(a)}return"-"+this.negate().toString(a)}d=b.fromNumber(Math.pow(a,6));c=this;for(var e="";;){var f=c.div(d),g=c.subtract(f.multiply(d)).toInt().toString(a);c=f;if(c.isZero())return g+e;for(;6>g.length;)g="0"+g;e=""+g+e}};b.prototype.getHighBits=function(){return this.high};b.prototype.getHighBitsUnsigned=
 function(){return this.high>>>0};b.prototype.getLowBits=function(){return this.low};b.prototype.getLowBitsUnsigned=function(){return this.low>>>0};b.prototype.getNumBitsAbs=function(){if(this.isNegative())return this.equals(b.MIN_SIGNED_VALUE)?64:this.negate().getNumBitsAbs();for(var a=0!=this.high?this.high:this.low,c=31;0<c&&0==(a&1<<c);c--);return 0!=this.high?c+33:c+1};b.prototype.isZero=function(){return 0==this.high&&0==this.low};b.prototype.isNegative=function(){return!this.unsigned&&0>this.high};
 b.prototype.isOdd=function(){return 1==(this.low&1)};b.prototype.equals=function(a){return this.unsigned!=a.unsigned&&this.high>>>31!=a.high>>>31?r:this.high==a.high&&this.low==a.low};b.prototype.notEquals=function(a){return!this.equals(a)};b.prototype.lessThan=function(a){return 0>this.compare(a)};b.prototype.lessThanOrEqual=function(a){return 0>=this.compare(a)};b.prototype.greaterThan=function(a){return 0<this.compare(a)};b.prototype.greaterThanOrEqual=function(a){return 0<=this.compare(a)};b.prototype.compare=
diff --git a/docs/Long.html b/docs/Long.html
index a508d59..54d8eed 100644
--- a/docs/Long.html
+++ b/docs/Long.html
@@ -41,7 +41,7 @@ <h2>
     
         
 <dt>
-    <h4 class="name" id="Long"><span class="type-signature"></span>new Long<span class="signature">(low, high, <span class="optional">unsigned</span>)</span><span class="type-signature"></span></h4>
+    <h4 class="name" id="Long"><span class="type-signature"></span>new Long<span class="signature">(low, <span class="optional">high</span>, <span class="optional">unsigned</span>)</span><span class="type-signature"></span></h4>
     
     
 </dt>
@@ -92,6 +92,9 @@ <h5>Parameters:</h5>
             
                 
 <span class="param-type">number</span>
+|
+
+<span class="param-type">!{low: number, high: number, unsigned: boolean}</span>
 
 
             
@@ -107,7 +110,7 @@ <h5>Parameters:</h5>
             
             
             
-            <td class="description last">The low (signed) 32 bits of the long.</td>
+            <td class="description last">The low (signed) 32 bits of the long.
 Optionally accepts a Long-like object as the first parameter.</td>
         </tr>
 	
 	
@@ -129,6 +132,8 @@ <h5>Parameters:</h5>
             
                 <td class="attributes">
                 
+                    &lt;optional><br>
+                
                     
                 
                 </td>
diff --git a/externs/Long.js b/externs/Long.js
index 6ff9897..9538fa3 100644
--- a/externs/Long.js
+++ b/externs/Long.js
@@ -27,8 +27,8 @@
  */
 
 /**
- * @param {number} low
- * @param {number} high
+ * @param {number|!{low: number, high: number, unsigned: boolean}} low
+ * @param {number=} high
  * @param {boolean=} unsigned
  * @constructor
  */
diff --git a/package.json b/package.json
index 8a90169..f181223 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "long",
-    "version": "1.1.3",
+    "version": "1.1.4",
     "author": "Daniel Wirtz <dcode@dcode.io>",
     "description": "A Long class for representing a 64-bit two's-complement integer value.",
     "main": "index.js",
diff --git a/src/Long.js b/src/Long.js
index cde012d..03afe1b 100644
--- a/src/Long.js
+++ b/src/Long.js
@@ -44,12 +44,18 @@
      * 
      * @exports Long
      * @class A Long class for representing a 64-bit two's-complement integer value.
-     * @param {number} low The low (signed) 32 bits of the long.
-     * @param {number} high The high (signed) 32 bits of the long.
+     * @param {number|!{low: number, high: number, unsigned: boolean}} low The low (signed) 32 bits of the long.
+     *  Optionally accepts a Long-like object as the first parameter.
+     * @param {number=} high The high (signed) 32 bits of the long.
      * @param {boolean=} unsigned Whether unsigned or not. Defaults to `false` (signed).
      * @constructor
      */
     var Long = function(low, high, unsigned) {
+        if (low && typeof low === 'object') {
+            high = low.high;
+            unsigned = low.unsigned;
+            low = low.low;
+        }
         
         /**
          * The low 32 bits as a signed value.
diff --git a/tests/suite.js b/tests/suite.js
index 4e1ff8c..ab37452 100644
--- a/tests/suite.js
+++ b/tests/suite.js
@@ -25,6 +25,10 @@ var suite = {
         var longVal = new Long(0xFFFFFFFF, 0x7FFFFFFF);
         test.equal(longVal.toNumber(), 9223372036854775807);
         test.equal(longVal.toString(), "9223372036854775807");
+        var longVal2 = new Long(longVal);
+        test.equal(longVal2.toNumber(), 9223372036854775807);
+        test.equal(longVal2.toString(), "9223372036854775807");
+        test.equal(longVal2.unsigned, longVal.unsigned);
         test.done();
     },