diff --git a/modules/data/src/dispatchers/entity-dispatcher-base.ts b/modules/data/src/dispatchers/entity-dispatcher-base.ts
index f33d598821..1e1aa7d496 100644
--- a/modules/data/src/dispatchers/entity-dispatcher-base.ts
+++ b/modules/data/src/dispatchers/entity-dispatcher-base.ts
@@ -344,7 +344,7 @@ export class EntityDispatcherBase<T> implements EntityDispatcher<T> {
       options
     );
     if (options.isOptimistic) {
-      this.guard.mustBeEntity(action as EntityAction);
+      this.guard.mustBeUpdate(action);
     }
     this.dispatch(action);
     return this.getResponseData$<UpdateResponseData<T>>(