diff --git a/source/reference/method/db.collection.ensureIndex.txt b/source/reference/method/db.collection.ensureIndex.txt
index 06152698acc..2e5ff47f024 100644
--- a/source/reference/method/db.collection.ensureIndex.txt
+++ b/source/reference/method/db.collection.ensureIndex.txt
@@ -1,5 +1,5 @@
 =============================
-db.collection.ensureIndexes()
+db.collection.ensureIndex()
 =============================
 
 .. default-domain:: mongodb