diff --git a/README.md b/README.md
index d46e7f6..684218f 100644
--- a/README.md
+++ b/README.md
@@ -141,7 +141,7 @@ class Model
             return iterator_to_array($data);
         }
 
-        throw new InvalidArgumentException(sprintf('Expected array, Traversable or KeyValueContainer, got "%s"', is_object($data) ? getclass($data) : get_type($data)));
+        throw new InvalidArgumentException(sprintf('Expected array, Traversable or KeyValueContainer, got "%s"', is_object($data) ? get_class($data) : gettype($data)));
     }
 }
 ```