diff --git a/std/encoding/json/buffer.jule b/std/encoding/json/buffer.jule
index 70f87f31f..5a390359a 100644
--- a/std/encoding/json/buffer.jule
+++ b/std/encoding/json/buffer.jule
@@ -98,7 +98,7 @@ fn growSlice(b: []byte, n: int): []byte {
     if c < cap(b)<<1 {
         c = cap(b) << 1
     }
-    mut b2 := append([]byte(nil), make([]byte, c)...)
+    mut b2 := make([]byte, len(b), c)
     copy(b2, b)
-    ret b2[:len(b)]
+    ret b2
 }
\ No newline at end of file