diff --git a/guide/english/kotlin/strings/index.md b/guide/english/kotlin/strings/index.md
index d5c7590e1e..74cbed4936 100644
--- a/guide/english/kotlin/strings/index.md
+++ b/guide/english/kotlin/strings/index.md
@@ -21,8 +21,8 @@ val lastName = "Musk"
 In addition, notice the usage of `val` variable type, here is how it behaves
 
 ```kotlin
-firstName = "Mark" // can be changed
-lastName = "Zuckerberg" // cannot be changed
+var firstName = "Mark" // can be changed
+val lastName = "Zuckerberg" // cannot be changed
 lastName = 12 // Error: type mismatch
 ```