diff --git a/src/language/ast.js b/src/language/ast.js
index 6849993b63f..0618b2d0828 100644
--- a/src/language/ast.js
+++ b/src/language/ast.js
@@ -289,7 +289,6 @@ export type BooleanValue = {
 export type NullValue = {
   kind: 'NullValue';
   loc?: Location;
-  // value: null;
 }
 
 export type EnumValue = {