diff --git a/packages/apollo-client/src/core/ObservableQuery.ts b/packages/apollo-client/src/core/ObservableQuery.ts
index 3681c08dbd0..16286a41711 100644
--- a/packages/apollo-client/src/core/ObservableQuery.ts
+++ b/packages/apollo-client/src/core/ObservableQuery.ts
@@ -247,6 +247,7 @@ export class ObservableQuery<
 
   public resetLastResults(): void {
     delete this.lastResult;
+    delete this.lastResultSnapshot;
     delete this.lastError;
     this.isTornDown = false;
   }