diff --git a/src/clojure/monger/collection.clj b/src/clojure/monger/collection.clj
index 15271f3..812503a 100644
--- a/src/clojure/monger/collection.clj
+++ b/src/clojure/monger/collection.clj
@@ -346,7 +346,7 @@
 
     ;; add :band field to all the records found in \"people\" collection, otherwise only the first matched record
     ;; will be updated
-    (monger.collection/update db \"people\" {} {\"$set\" {:band \"The Beatles\"}} :multi true)
+    (monger.collection/update db \"people\" {} {\"$set\" {:band \"The Beatles\"}} {:multi true})
 
     ;; inserts the record if it did not exist in the collection
     (monger.collection/update db \"people\" {:first_name \"Yoko\"} {:first_name \"Yoko\" :last_name \"Ono\"} {:upsert true)