diff --git a/swift/lib/ProtocGenSwift/ProtocGenSwift/JSONWriter.swift b/swift/lib/ProtocGenSwift/ProtocGenSwift/JSONWriter.swift
index fcbac0f..9323dad 100644
--- a/swift/lib/ProtocGenSwift/ProtocGenSwift/JSONWriter.swift
+++ b/swift/lib/ProtocGenSwift/ProtocGenSwift/JSONWriter.swift
@@ -8,7 +8,7 @@ public class JSONWriter : Writer {
     var tag: Int! = nil
     var isRepeatedStack: [Bool] = []
     
-    public class func withCapacity(capacity: Int) throws -> Writer {
+    public class func withCapacity(capacity: Int) -> Writer {
         return JSONWriter()
     }
     
diff --git a/swift/lib/ProtocGenSwift/ProtocGenSwiftTests/ProtocGenSwiftTests.swift b/swift/lib/ProtocGenSwift/ProtocGenSwiftTests/ProtocGenSwiftTests.swift
index 6f1b86e..d6283b6 100644
--- a/swift/lib/ProtocGenSwift/ProtocGenSwiftTests/ProtocGenSwiftTests.swift
+++ b/swift/lib/ProtocGenSwift/ProtocGenSwiftTests/ProtocGenSwiftTests.swift
@@ -33,7 +33,7 @@ class ProtocGenSwiftTests: XCTestCase {
     
     func testJSON() {
         do {
-            let writer = try JSONWriter.withCapacity(demoMessage.sizeInBytes)
+            let writer = JSONWriter.withCapacity(demoMessage.sizeInBytes)
             demoMessage.toWriter(writer)
             let buffer = try writer.toBuffer()
             let jsonString = NSString(data: buffer, encoding: NSUTF8StringEncoding)
@@ -56,7 +56,7 @@ class ProtocGenSwiftTests: XCTestCase {
     
     func testJSONReadArray() {
         do {
-            let writer = try JSONWriter.withCapacity(demoMessageWithEmptyNestedArray.sizeInBytes)
+            let writer = JSONWriter.withCapacity(demoMessageWithEmptyNestedArray.sizeInBytes)
             demoMessageWithEmptyNestedArray.toWriter(writer)
             let jsonString = "{\"demoRepeatedNestedMessage\":[]}"
             let jsonData = jsonString.dataUsingEncoding(NSUTF8StringEncoding)!