diff --git a/includes/datasource_entity.inc b/includes/datasource_entity.inc
index 034bb52..b7d43cf 100644
--- a/includes/datasource_entity.inc
+++ b/includes/datasource_entity.inc
@@ -189,7 +189,9 @@ class SearchApiEntityDataSourceController extends SearchApiAbstractDataSourceCon
               $this->startTrackingFallback(array($index->machine_name => $index));
             }
           }
-          $query->condition($bundle_column, $bundles);
+          if ($bundles) {
+            $query->condition($bundle_column, $bundles);
+          }
         }
 
         // INSERT ... SELECT ...