diff --git a/lib/operations/db_ops.js b/lib/operations/db_ops.js
index cc0a70962c1..55ef29d7165 100644
--- a/lib/operations/db_ops.js
+++ b/lib/operations/db_ops.js
@@ -746,7 +746,7 @@ function createCreateIndexCommand(db, name, fieldOrSpec, options) {
   if (selector['unique'] == null) selector['unique'] = finalUnique;
 
   // Remove any write concern operations
-  const removeKeys = ['w', 'wtimeout', 'j', 'fsync', 'readPreference'];
+  const removeKeys = ['w', 'wtimeout', 'j', 'fsync', 'readPreference', 'session'];
   for (let i = 0; i < removeKeys.length; i++) {
     delete selector[removeKeys[i]];
   }