diff --git a/src/config.coffee b/src/config.coffee
index d4fe1e753..18b111471 100644
--- a/src/config.coffee
+++ b/src/config.coffee
@@ -865,7 +865,7 @@ class Config
 
     if value?
       defaultValue = @deepClone(defaultValue)
-      value = _.deepExtends(defaultValue, value) if isPlainObject(value) and isPlainObject(defaultValue)
+      value = _.deepExtend(defaultValue, value) if isPlainObject(value) and isPlainObject(defaultValue)
     else
       value = @deepClone(defaultValue)