diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 39e4f90698d..0e1f08a69d8 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2220,6 +2220,10 @@ namespace ts {
 
     export type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
 
+    /**
+     * This is either an `export =` or an `export default` declaration.
+     * Unless `isExportEquals` is set, this node was parsed as an `export default`.
+     */
     export interface ExportAssignment extends DeclarationStatement {
         kind: SyntaxKind.ExportAssignment;
         parent?: SourceFile;
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 86a33c179a3..8739616ce14 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -1412,6 +1412,10 @@ declare namespace ts {
         name: Identifier;
     }
     type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
+    /**
+     * This is either an `export =` or an `export default` declaration.
+     * Unless `isExportEquals` is set, this node was parsed as an `export default`.
+     */
     interface ExportAssignment extends DeclarationStatement {
         kind: SyntaxKind.ExportAssignment;
         parent?: SourceFile;
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index 1c3c13f48b0..21ea143e8c5 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -1412,6 +1412,10 @@ declare namespace ts {
         name: Identifier;
     }
     type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
+    /**
+     * This is either an `export =` or an `export default` declaration.
+     * Unless `isExportEquals` is set, this node was parsed as an `export default`.
+     */
     interface ExportAssignment extends DeclarationStatement {
         kind: SyntaxKind.ExportAssignment;
         parent?: SourceFile;