diff --git a/src/config.coffee b/src/config.coffee
index 1f23d7a5d..8920b7ed7 100644
--- a/src/config.coffee
+++ b/src/config.coffee
@@ -604,7 +604,7 @@ class Config
     @emitter.emit 'did-change'
 
   setSchema: (keyPath, schema) ->
-    unless typeof schema is "object"
+    unless isPlainObject(schema)
       throw new Error("Error loading schema for #{keyPath}: schemas can only be objects!")
 
     unless typeof schema.type?