diff --git a/src/ng/filter/filters.js b/src/ng/filter/filters.js
index 5757760245b9..6a1d2eb16acc 100644
--- a/src/ng/filter/filters.js
+++ b/src/ng/filter/filters.js
@@ -53,8 +53,12 @@ function currencyFilter($locale) {
   var formats = $locale.NUMBER_FORMATS;
   return function(amount, currencySymbol){
     if (isUndefined(currencySymbol)) currencySymbol = formats.CURRENCY_SYM;
-    return formatNumber(amount, formats.PATTERNS[1], formats.GROUP_SEP, formats.DECIMAL_SEP, 2).
-                replace(/\u00A4/g, currencySymbol);
+
+    // if null or undefined pass it through
+    return (amount == null)
+        ? amount
+        : formatNumber(amount, formats.PATTERNS[1], formats.GROUP_SEP, formats.DECIMAL_SEP, 2).
+            replace(/\u00A4/g, currencySymbol);
   };
 }
 
@@ -113,14 +117,18 @@ numberFilter.$inject = ['$locale'];
 function numberFilter($locale) {
   var formats = $locale.NUMBER_FORMATS;
   return function(number, fractionSize) {
-    return formatNumber(number, formats.PATTERNS[0], formats.GROUP_SEP, formats.DECIMAL_SEP,
-      fractionSize);
+
+    // if null or undefined pass it through
+    return (number == null)
+        ? number
+        : formatNumber(number, formats.PATTERNS[0], formats.GROUP_SEP, formats.DECIMAL_SEP,
+                       fractionSize);
   };
 }
 
 var DECIMAL_SEP = '.';
 function formatNumber(number, pattern, groupSep, decimalSep, fractionSize) {
-  if (number == null || !isFinite(number) || isObject(number)) return '';
+  if (!isFinite(number) || isObject(number)) return '';
 
   var isNegative = number < 0;
   number = Math.abs(number);
diff --git a/test/ng/filter/filtersSpec.js b/test/ng/filter/filtersSpec.js
index 7d2acef42601..6f48bc826749 100644
--- a/test/ng/filter/filtersSpec.js
+++ b/test/ng/filter/filtersSpec.js
@@ -98,10 +98,14 @@ describe('filters', function() {
       expect(currency(1234.5678, "USD$")).toEqual('USD$1,234.57');
     });
 
+    it('should pass through null and undefined to be compatible with one-time binding', function() {
+      expect(currency(undefined)).toBe(undefined);
+      expect(currency(null)).toBe(null);
+    });
 
     it('should return empty string for non-numbers', function() {
-      expect(currency()).toBe('');
       expect(currency('abc')).toBe('');
+      expect(currency({})).toBe('');
     });
 
     it('should handle zero and nearly-zero values properly', function() {
@@ -130,7 +134,6 @@ describe('filters', function() {
       expect(number(1234)).toEqual('1,234');
       expect(number(1234.5678)).toEqual('1,234.568');
       expect(number(Number.NaN)).toEqual('');
-      expect(number(null)).toEqual('');
       expect(number({})).toEqual('');
       expect(number([])).toEqual('');
       expect(number(+Infinity)).toEqual('');
@@ -161,6 +164,11 @@ describe('filters', function() {
       expect(number(0,        8)).toEqual("0.00000000");
     });
 
+    it('should pass through null and undefined to be compatible with one-time binding', function() {
+      expect(number(null)).toBe(null);
+      expect(number(undefined)).toBe(undefined);
+    });
+
     it('should filter exponentially large numbers', function() {
       expect(number(1e50)).toEqual('1e+50');
       expect(number(-2e100)).toEqual('-2e+100');