diff --git a/Code/CoreData/RKManagedObjectImporter.m b/Code/CoreData/RKManagedObjectImporter.m
index d0cc0ab4..b05e09f6 100644
--- a/Code/CoreData/RKManagedObjectImporter.m
+++ b/Code/CoreData/RKManagedObjectImporter.m
@@ -215,6 +215,7 @@
     NSDictionary *mappingDictionary = @{ (keyPath ?: [NSNull null]) : mapping };
     RKMapperOperation *mapper = [[RKMapperOperation alloc] initWithRepresentation:parsedData mappingsDictionary:mappingDictionary];
     mapper.mappingOperationDataSource = self.mappingOperationDataSource;
+    self.mappingOperationDataSource.parentOperation = mapper;
     __block RKMappingResult *mappingResult;
     [self.managedObjectContext performBlockAndWait:^{
         [mapper start];