diff --git a/src/core/QueryInfo.ts b/src/core/QueryInfo.ts
index 020a51a9fd4..d6a215816ab 100644
--- a/src/core/QueryInfo.ts
+++ b/src/core/QueryInfo.ts
@@ -175,7 +175,8 @@ export class QueryInfo {
     const oldDiff = this.diff;
     this.diff = diff;
     if (!this.dirty &&
-        (diff && diff.result) !== (oldDiff && oldDiff.result)) {
+        !equal(oldDiff && oldDiff.result,
+               diff && diff.result)) {
       this.dirty = true;
       if (!this.notifyTimeout) {
         this.notifyTimeout = setTimeout(() => this.notify(), 0);