diff --git a/HISTORY.md b/HISTORY.md
index 4e9e4ca6e76d151ad24be1991107d5668c87f6fe..824582713f9e65ebddd9c1391295d44f1718f804 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -5,7 +5,7 @@
 ### New Features
 
 ### Bug Fixes
-
+* Fsync after writing global seq number to the ingestion file in ExternalSstFileIngestionJob.
 
 ## 5.13.0 (3/20/2018)
 ### Public API Change
diff --git a/db/external_sst_file_ingestion_job.cc b/db/external_sst_file_ingestion_job.cc
index 89b977ce0ea3f5532805e57c7b5cb03cb5e25be0..b37440e47c747fb406ff8f2ee75344d3b71b8e53 100644
--- a/db/external_sst_file_ingestion_job.cc
+++ b/db/external_sst_file_ingestion_job.cc
@@ -510,6 +510,9 @@ Status ExternalSstFileIngestionJob::AssignGlobalSeqnoForIngestedFile(
   std::string seqno_val;
   PutFixed64(&seqno_val, seqno);
   status = rwfile->Write(file_to_ingest->global_seqno_offset, seqno_val);
+  if (status.ok()) {
+    status = rwfile->Fsync();
+  }
   if (status.ok()) {
     file_to_ingest->assigned_seqno = seqno;
   }