diff --git a/ch1-basic/ch1-03-array-string-and-slice.md b/ch1-basic/ch1-03-array-string-and-slice.md
index 8b8b732..d9d98b4 100644
--- a/ch1-basic/ch1-03-array-string-and-slice.md
+++ b/ch1-basic/ch1-03-array-string-and-slice.md
@@ -299,7 +299,7 @@ func str2bytes(s string) []byte {
 func bytes2str(s []byte) (p string) {
 	data := make([]byte, len(s))
 	for i, c := s {
-		p[i] = c
+		data[i] = c
 	}
 
 	hdr := (*reflect.StringHeader)(unsafe.Pointer(&p))