diff --git a/tools/snapshot/snapshot_builder.cc b/tools/snapshot/snapshot_builder.cc
index 54a4a2e73da249..0fd2c49d2845a8 100644
--- a/tools/snapshot/snapshot_builder.cc
+++ b/tools/snapshot/snapshot_builder.cc
@@ -96,6 +96,7 @@ std::string SnapshotBuilder::Generate(
     // Must be out of HandleScope
     StartupData blob =
         creator.CreateBlob(SnapshotCreator::FunctionCodeHandling::kClear);
+    CHECK(blob.CanBeRehashed());
     // Must be done while the snapshot creator isolate is entered i.e. the
     // creator is still alive.
     main_instance->Dispose();