diff --git a/numeral.js b/numeral.js
index 22726c9e..72a88f8b 100644
--- a/numeral.js
+++ b/numeral.js
@@ -59,7 +59,7 @@
 
         if (numeral.isNumeral(input)) {
             value = input.value();
-        } else if (input === 0 || typeof input === 'undefined') {
+        } else if (input === 0 || input == null || typeof input === 'undefined' || input.equals('')) {
             value = 0;
         } else if (input === null || _.isNaN(input)) {
             value = null;
diff --git a/src/numeral.js b/src/numeral.js
index 3a9d2521..ef96c448 100644
--- a/src/numeral.js
+++ b/src/numeral.js
@@ -59,7 +59,7 @@
 
         if (numeral.isNumeral(input)) {
             value = input.value();
-        } else if (input === 0 || typeof input === 'undefined') {
+        } else if (input === 0 || input == null || typeof input === 'undefined' || input.equals('')) {
             value = 0;
         } else if (input === null || _.isNaN(input)) {
             value = null;