diff --git a/lib/model.js b/lib/model.js
index 31f9ca5b753..9199828201d 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -3743,7 +3743,7 @@ function getModelsMapForPopulate(model, docs, options) {
           modelNames = discriminatorKey ? null : [model.modelName];
         }
       } else {
-        modelNames = [modelNameFromQuery];  // query options
+        modelNames = [modelNameFromQuery]; // query options
       }
     }