diff --git a/code/model/Translatable.php b/code/model/Translatable.php
index c917a46..18b19f6 100755
--- a/code/model/Translatable.php
+++ b/code/model/Translatable.php
@@ -929,6 +929,8 @@ class Translatable extends DataExtension implements PermissionProvider {
 	function applyTranslatableFieldsUpdate($fields, $type) {
 		if (method_exists($this, $type)) {
 			$this->$type($fields);
+		} else {
+			throw new InvalidArgumentException("Method $type does not exist on object of type ".  get_class($this));
 		}
 	}