diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index d0947b35693..7f8e1b2f8df 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -3632,6 +3632,8 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, Promi
                     return emitOnlyPinnedOrTripleSlashComments(node);
                 }
 
+                // TODO (yuisu) : we should not have special cases to condition emitting comments
+                // but have one place to fix check for these conditions.
                 if (node.kind !== SyntaxKind.MethodDeclaration && node.kind !== SyntaxKind.MethodSignature &&
                     node.parent && node.parent.kind !== SyntaxKind.PropertyAssignment &&
                     node.parent.kind !== SyntaxKind.CallExpression) {