diff --git a/qiskit/primitives/primitive_job.py b/qiskit/primitives/primitive_job.py
index 95e3768898f1..79779d5262c4 100644
--- a/qiskit/primitives/primitive_job.py
+++ b/qiskit/primitives/primitive_job.py
@@ -48,7 +48,7 @@ def _submit(self):
         self._future = executor.submit(self._function, *self._args, **self._kwargs)
         executor.shutdown(wait=False)
 
-    def _prepare_dump(self):
+    def _prepare_dump(self):  # This method allows PrimitiveJob to be serialized
         _ = self.result()
         _ = self.status()
         self._future = None