diff --git a/opengraph_meta.common.inc b/opengraph_meta.common.inc
index c770a86..2d57b9d 100644
--- a/opengraph_meta.common.inc
+++ b/opengraph_meta.common.inc
@@ -47,6 +47,9 @@ class OpenGraphMeta {
       }
       libxml_use_internal_errors(FALSE); // turn libxml errors back on
     }
+    
+    // Allow other modules to alter harvest images.
+    drupal_alter('opengraph_meta_harvest_images', $ret, $node, $body);
 
     return $ret;
   }