diff --git a/04_scope/02_block-scope/02_closure/02/main.go b/04_scope/02_block-scope/02_closure/02/main.go
index 9213136a..a58c8c7f 100644
--- a/04_scope/02_block-scope/02_closure/02/main.go
+++ b/04_scope/02_block-scope/02_closure/02/main.go
@@ -2,7 +2,7 @@ package main
 
 import "fmt"
 
-var x = 0
+var x int
 
 func increment() int {
 	x++