diff --git a/lib/std/zig/Ast.zig b/lib/std/zig/Ast.zig
index 61a10189b800009f051d48f918ac3ca7fb01ed97..c918f8a9800e0a4050096eb89e58b353246779e9 100644
--- a/lib/std/zig/Ast.zig
+++ b/lib/std/zig/Ast.zig
@@ -3120,7 +3120,7 @@ pub const Node = struct {
         /// `lhs[b..c]`. rhs is index into Slice
         /// main_token is the lbracket.
         slice,
-        /// `lhs[b..c :d]`. rhs is index into SliceSentinel
+        /// `lhs[b..c :d]`. rhs is index into SliceSentinel. Slice end "c" can be omitted.
         /// main_token is the lbracket.
         slice_sentinel,
         /// `lhs.*`. rhs is unused.