diff --git a/ObjectMapper/Transforms/DateTransform.swift b/ObjectMapper/Transforms/DateTransform.swift
index 33cb3d55..a0c1edc6 100644
--- a/ObjectMapper/Transforms/DateTransform.swift
+++ b/ObjectMapper/Transforms/DateTransform.swift
@@ -38,6 +38,11 @@ public class DateTransform: TransformType {
 		if let timeInt = value as? Double {
 			return NSDate(timeIntervalSince1970: NSTimeInterval(timeInt))
 		}
+		
+		if let timeStr = value as? String {
+			return NSDate(timeIntervalSince1970: NSTimeInterval(atof(timeStr)))
+		}
+		
 		return nil
 	}
 
diff --git a/ObjectMapperTests/CustomTransformTests.swift b/ObjectMapperTests/CustomTransformTests.swift
index 6dcefe63..6e3c3433 100644
--- a/ObjectMapperTests/CustomTransformTests.swift
+++ b/ObjectMapperTests/CustomTransformTests.swift
@@ -54,6 +54,14 @@ class CustomTransformTests: XCTestCase {
 		XCTAssertNotNil(parsedTransforms)
 		XCTAssertEqual(parsedTransforms?.date, transforms.date)
 		XCTAssertEqual(parsedTransforms?.dateOpt, transforms.dateOpt)
+		
+		let JSONDateString: [String: AnyObject] = ["date": "946684800", "dateOpt": "946684912"]
+		let parsedTransformsDateString = mapper.map(JSONDateString)
+		
+		XCTAssertNotNil(parsedTransformsDateString)
+		XCTAssertEqual(parsedTransforms?.date, parsedTransformsDateString?.date)
+		XCTAssertEqual(parsedTransforms?.dateOpt, parsedTransformsDateString?.dateOpt)
+
 	}
 	
 	func testISO8601DateTransform() {