diff --git a/source/chapter1/02_a_swift_tour.md b/source/chapter1/02_a_swift_tour.md
index 3103c659..cdf4b961 100755
--- a/source/chapter1/02_a_swift_tour.md
+++ b/source/chapter1/02_a_swift_tour.md
@@ -707,7 +707,7 @@ possibleInteger = .Some(100)
 在类型名后面使用`where`来指定对类型的需求，比如，限定类型实现某一个协议，限定两个类型是相同的，或者限定某个类必须有一个特定的父类
 
 ```swift
-func anyCommonElements <T, U where T: Sequence, U: Sequence, T.GeneratorType.Element: Equatable, T.GeneratorType.Element == U.GeneratorType.Element> (lhs: T, rhs: U) -> Bool {
+func anyCommonElements <T, U where T: SequenceType, U: SequenceType, T.Generator.Element: Equatable, T.Generator.Element == U.Generator.Element> (lhs: T, rhs: U) -> Bool {
     for lhsItem in lhs {
         for rhsItem in rhs {
             if lhsItem == rhsItem {