diff --git a/src/09-concurrency-practice/69-data-race-append/main.go b/src/09-concurrency-practice/69-data-race-append/main.go
index ec33eb1..8ad0ef4 100644
--- a/src/09-concurrency-practice/69-data-race-append/main.go
+++ b/src/09-concurrency-practice/69-data-race-append/main.go
@@ -3,7 +3,7 @@ package main
 import "fmt"
 
 func listing1() {
-	s := make([]int, 1)
+	s := make([]int, 0, 1)
 
 	go func() {
 		s1 := append(s, 1)