diff --git a/plugins/inputs/mongodb/README.md b/plugins/inputs/mongodb/README.md
index c4c308f2f..e831d6418 100644
--- a/plugins/inputs/mongodb/README.md
+++ b/plugins/inputs/mongodb/README.md
@@ -69,6 +69,7 @@ Error in input [mongodb]: not authorized on admin to execute command { serverSta
     - repl_lag (integer)
     - repl_queries_per_sec (integer)
     - repl_updates_per_sec (integer)
+    - repl_oplog_window_sec (integer)
     - resident_megabytes (integer)
     - state (string)
     - total_available (integer)
@@ -92,35 +93,6 @@ Error in input [mongodb]: not authorized on admin to execute command { serverSta
     - wtcache_tracked_dirty_bytes (integer)
     - wtcache_worker_thread_evictingpages (integer)
 
-The telegraf plugin collects mongodb stats exposed by serverStatus and few more
-and create a single measurement containing values e.g.
- * active_reads
- * active_writes
- * commands_per_sec
- * deletes_per_sec
- * flushes_per_sec
- * getmores_per_sec
- * inserts_per_sec
- * net_in_bytes
- * net_out_bytes
- * open_connections
- * percent_cache_dirty
- * percent_cache_used
- * queries_per_sec
- * queued_reads
- * queued_writes
- * resident_megabytes
- * updates_per_sec
- * vsize_megabytes
- * total_in_use
- * total_available
- * total_created
- * total_refreshing
- * ttl_deletes_per_sec
- * ttl_passes_per_sec
- * repl_lag
- * repl_oplog_window_s
- * jumbo_chunks (only if mongos or mongo config)
 - mongodb_db_stats
   - tags:
     - db_name
diff --git a/plugins/inputs/mongodb/mongodb_data.go b/plugins/inputs/mongodb/mongodb_data.go
index 2c45f7ea2..17d49b1c7 100644
--- a/plugins/inputs/mongodb/mongodb_data.go
+++ b/plugins/inputs/mongodb/mongodb_data.go
@@ -60,7 +60,7 @@ var DefaultReplStats = map[string]string{
 	"member_status":         "NodeType",
 	"state":                 "NodeState",
 	"repl_lag":              "ReplLag",
-	"repl_oplog_window_s":   "OplogTimeDiff",
+	"repl_oplog_window_sec": "OplogTimeDiff",
 }
 
 var DefaultClusterStats = map[string]string{
diff --git a/plugins/inputs/mongodb/mongodb_data_test.go b/plugins/inputs/mongodb/mongodb_data_test.go
index e51b4e404..79a9a6c59 100644
--- a/plugins/inputs/mongodb/mongodb_data_test.go
+++ b/plugins/inputs/mongodb/mongodb_data_test.go
@@ -162,7 +162,7 @@ func TestStateTag(t *testing.T) {
 		"repl_queries_per_sec":  int64(0),
 		"repl_updates_per_sec":  int64(0),
 		"repl_lag":              int64(0),
-		"repl_oplog_window_s":   int64(0),
+		"repl_oplog_window_sec": int64(0),
 		"resident_megabytes":    int64(0),
 		"updates_per_sec":       int64(0),
 		"vsize_megabytes":       int64(0),