diff --git a/webform_entity.module b/webform_entity.module
index 2048f06cd2d56265e4dbef71a31355c4c2b6a178..b9d7ea652408c9049b5b9ccf85a19ee2b6e46a3c 100644
--- a/webform_entity.module
+++ b/webform_entity.module
@@ -123,6 +123,31 @@ function webform_entity_entity_info() {
   return $entity_info;
 }
 
+/**
+ *  Implements hook_entity_property_info().
+ */
+function webform_entity_entity_property_info() {
+  $info['webform_submission_entity']['properties']['sid'] = array(
+    'label' => t("Webform Submission ID"),
+    'type' => 'integer',
+    'description' => t("The unique ID of the submission."),
+    'schema field' => 'sid',
+  );
+  $info['webform_submission_entity']['properties']['nid'] = array(
+    'label' => t("Webform Node ID"),
+    'type' => 'integer',
+    'description' => t("The node ID of the submission's webform."),
+    'schema field' => 'nid',
+  );
+  $info['webform_submission_entity']['properties']['uid'] = array(
+    'label' => t("Webform Submission User ID"),
+    'type' => 'integer',
+    'description' => t("The user ID of the submission's author."),
+    'schema field' => 'uid',
+  );
+  return $info;
+}
+
 /**
  * Implements hook_token_info().
  */