diff --git a/compiler/src/dotty/tools/dotc/ast/Desugar.scala b/compiler/src/dotty/tools/dotc/ast/Desugar.scala
index 0f4421698240..5d3df980e7db 100644
--- a/compiler/src/dotty/tools/dotc/ast/Desugar.scala
+++ b/compiler/src/dotty/tools/dotc/ast/Desugar.scala
@@ -1487,18 +1487,18 @@ object desugar {
   /** Map n-ary function `(x1: T1, ..., xn: Tn) => body` where n != 1 to unary function as follows:
    *
    *    (x$1: (T1, ..., Tn)) => {
-   *      def x1: T1 = x$1._1
+   *      val x1: T1 = x$1._1
    *      ...
-   *      def xn: Tn = x$1._n
+   *      val xn: Tn = x$1._n
    *      body
    *    }
    *
    *  or if `isGenericTuple`
    *
    *    (x$1: (T1, ... Tn) => {
-   *      def x1: T1 = x$1.apply(0)
+   *      val x1: T1 = x$1.apply(0)
    *      ...
-   *      def xn: Tn = x$1.apply(n-1)
+   *      val xn: Tn = x$1.apply(n-1)
    *      body
    *    }
    *