diff --git a/types/postcss-media-query-parser/index.d.ts b/types/postcss-media-query-parser/index.d.ts
index 92a5495561a32f..4f2459355ae7e6 100644
--- a/types/postcss-media-query-parser/index.d.ts
+++ b/types/postcss-media-query-parser/index.d.ts
@@ -9,8 +9,8 @@ export interface Node {
     sourceIndex: number;
     nodes?: Child[] | undefined;
 
-    walk(filter: string | RegExp, callback: WalkerCallback): void;
-    walk(callback: WalkerCallback): void;
+    walk(filter: string | RegExp, callback: WalkerCallback): boolean;
+    walk(callback: WalkerCallback): boolean;
 }
 
 export interface Child extends Node {
diff --git a/types/postcss-media-query-parser/postcss-media-query-parser-tests.ts b/types/postcss-media-query-parser/postcss-media-query-parser-tests.ts
index 71e52e311cf581..33151750b39484 100644
--- a/types/postcss-media-query-parser/postcss-media-query-parser-tests.ts
+++ b/types/postcss-media-query-parser/postcss-media-query-parser-tests.ts
@@ -24,9 +24,11 @@ if (result.nodes) {
     }
 }
 
+// $ExpectType boolean
 result.walk("", child => {
     child.parent.type;
 });
+// $ExpectType boolean
 result.walk(child => {
     child.parent.type;
 });