diff --git a/ng2-components/ng2-activiti-form/src/components/widgets/core/form-field-validator.spec.ts b/ng2-components/ng2-activiti-form/src/components/widgets/core/form-field-validator.spec.ts
index 3049242d9b..245fdf1b6a 100644
--- a/ng2-components/ng2-activiti-form/src/components/widgets/core/form-field-validator.spec.ts
+++ b/ng2-components/ng2-activiti-form/src/components/widgets/core/form-field-validator.spec.ts
@@ -158,6 +158,9 @@ describe('FormFieldValidator', () => {
             expect(NumberFieldValidator.isNumber('1')).toBeTruthy();
             expect(NumberFieldValidator.isNumber('1.0')).toBeTruthy();
             expect(NumberFieldValidator.isNumber('-1')).toBeTruthy();
+            expect(NumberFieldValidator.isNumber(1)).toBeTruthy();
+            expect(NumberFieldValidator.isNumber(0)).toBeTruthy();
+            expect(NumberFieldValidator.isNumber(-1)).toBeTruthy();
         });
 
         it('should not verify number', () => {
@@ -177,6 +180,24 @@ describe('FormFieldValidator', () => {
             expect(validator.validate(field)).toBeTruthy();
         });
 
+        it('should allow number value', () => {
+            let field = new FormFieldModel(new FormModel(), {
+                type: FormFieldTypes.NUMBER,
+                value: 44
+            });
+
+            expect(validator.validate(field)).toBeTruthy();
+        });
+
+        it('should allow zero number value', () => {
+            let field = new FormFieldModel(new FormModel(), {
+                type: FormFieldTypes.NUMBER,
+                value: 0
+            });
+
+            expect(validator.validate(field)).toBeTruthy();
+        });
+
         it('should fail for wrong number value', () => {
             let field = new FormFieldModel(new FormModel(), {
                 type: FormFieldTypes.NUMBER,
diff --git a/ng2-components/ng2-activiti-form/src/components/widgets/core/form-field-validator.ts b/ng2-components/ng2-activiti-form/src/components/widgets/core/form-field-validator.ts
index 843e84aaec..8b6ae005e8 100644
--- a/ng2-components/ng2-activiti-form/src/components/widgets/core/form-field-validator.ts
+++ b/ng2-components/ng2-activiti-form/src/components/widgets/core/form-field-validator.ts
@@ -106,11 +106,12 @@ export class NumberFieldValidator implements FormFieldValidator {
                 field.value === '') {
                 return true;
             }
+            let valueStr = '' + field.value;
             let pattern = new RegExp(/^-?\d+$/);
             if (field.enableFractions) {
                 pattern = new RegExp(/^-?[0-9]+(\.[0-9]{1,2})?$/);
             }
-            if (field.value.match(pattern)) {
+            if (valueStr.match(pattern)) {
                 return true;
             }
             field.validationSummary = 'Incorrect number format';