diff --git a/src/main/scala/scalatutorial/sections/StandardLibrary.scala b/src/main/scala/scalatutorial/sections/StandardLibrary.scala
index 283552bf..db6ae76e 100644
--- a/src/main/scala/scalatutorial/sections/StandardLibrary.scala
+++ b/src/main/scala/scalatutorial/sections/StandardLibrary.scala
@@ -136,7 +136,7 @@ object StandardLibrary extends ScalaTutorialSection {
    * Complete the definition insertion sort by filling in the blanks in the definition below:
    */
   def insertionSort(res0: (Int, Int) => Boolean, res1: List[Int]): Unit = {
-    val cond: (Int, Int) => Boolean = res0
+    def cond(a: Int, b: Int): Boolean = res0
     def insert(x: Int, xs: List[Int]): List[Int] =
       xs match {
         case List() => x :: res1