diff --git a/SliceTricks.md b/SliceTricks.md
index e9a5fc0b..20cc0331 100644
--- a/SliceTricks.md
+++ b/SliceTricks.md
@@ -14,9 +14,9 @@ copy(b, a)
 
 // These two are often a little slower than the above one,
 // but they would be more efficient if there are more
-// elements to be appended to b.
+// elements to be appended to b after copying.
 b = append([]T(nil), a...)
-b = append(a[:0:0], a...
+b = append(a[:0:0], a...)
 ```
 
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