diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 6db26355d92..f5c4d880072 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -1309,7 +1309,7 @@ namespace ts {
                 case ParsingContext.ObjectBindingElements:
                     return token() === SyntaxKind.OpenBracketToken || token() === SyntaxKind.DotDotDotToken || isLiteralPropertyName();
                 case ParsingContext.HeritageClauseElement:
-                    // If we see { } then only consume it as an expression if it is followed by `,` or `{`
+                    // If we see `{ ... }` then only consume it as an expression if it is followed by `,` or `{`
                     // That way we won't consume the body of a class in its heritage clause.
                     if (token() === SyntaxKind.OpenBraceToken) {
                         return lookAhead(isValidHeritageClauseObjectLiteral);