diff --git a/_overviews/scala3-book/packaging-imports.md b/_overviews/scala3-book/packaging-imports.md
index 3ae2e7c318..e6e1aa7c91 100644
--- a/_overviews/scala3-book/packaging-imports.md
+++ b/_overviews/scala3-book/packaging-imports.md
@@ -199,7 +199,7 @@ package foo
 import scala.util.Random
 
 class ClassA:
-  def printRandom:
+  def printRandom(): Unit =
     val r = new Random   // use the imported class
     // more code here...
 ```
@@ -211,7 +211,7 @@ package foo
 
 class ClassA:
   import scala.util.Random   // inside ClassA
-  def printRandom {
+  def printRandom(): Unit =
     val r = new Random
     // more code here...