diff --git a/big.js/big.js-tests.ts b/big.js/big.js-tests.ts
index 6de9ee7cc..df6128314 100644
--- a/big.js/big.js-tests.ts
+++ b/big.js/big.js-tests.ts
@@ -230,4 +230,21 @@ function propertiesTest3() {
     y.c                        // '0'    [0].toString()
     y.e                        // 0
     y.s                        // -1
+}
+
+// see http://mikemcl.github.io/big.js/#faq
+// "How can I simultaneously use different decimal places and/or rounding mode settings for different Big numbers?"
+function testMultipleConstructors() {
+
+	var Big10 = Big();
+
+	// Set the decimal places of division operations for each constructor.
+	Big.DP = 3;
+	Big10.DP = 10;
+
+	var x = Big(5);
+	var y = Big10(5);
+
+	x.div(3)     // 1.667
+	y.div(3)     // 1.6666666667
 }
\ No newline at end of file
diff --git a/big.js/big.js.d.ts b/big.js/big.js.d.ts
index 4f6278a80..0e4ac48be 100644
--- a/big.js/big.js.d.ts
+++ b/big.js/big.js.d.ts
@@ -42,6 +42,9 @@ declare module BigJsLibrary {
         (value: string): BigJS;
         /** A decimal value.  */
         (value: BigJS): BigJS;
+		
+		/** A decimal value.  */
+        (): BigJS;
     }
 
     /** BigJS instance methods */