diff --git a/examples/04_functional/03_extensionFunctions.md b/examples/04_functional/03_extensionFunctions.md
index 3bbde43..da366cd 100755
--- a/examples/04_functional/03_extensionFunctions.md
+++ b/examples/04_functional/03_extensionFunctions.md
@@ -35,9 +35,10 @@ It is even possible to execute extensions on `null` references. In an extension
 ```run-kotlin
 //sampleStart
 fun <T> T?.nullSafeToString() = this?.toString() ?: "NULL"  // 1
-//sampleEnd
+
 fun main() {
     println(null.nullSafeToString())
     println("Kotlin".nullSafeToString())
 }
+//sampleEnd
 ```