diff --git a/mod/item.php b/mod/item.php
index 31d1a4acac..8290acb9e6 100644
--- a/mod/item.php
+++ b/mod/item.php
@@ -140,7 +140,7 @@ function item_post(&$a) {
 
 			// If the contact id doesn't fit with the contact, then set the contact to null
 			$thrparent = q("SELECT `author-link`, `network` FROM `item` WHERE `uri` = '%s' LIMIT 1", dbesc($thr_parent));
-			if (count($thrparent) AND in_array($thrparent[0]["network"], array(NETWORK_OSTATUS, NETWORK_DIASPORA))
+			if (count($thrparent) AND ($thrparent[0]["network"] === NETWORK_OSTATUS)
 				AND (normalise_link($parent_contact["url"]) != normalise_link($thrparent[0]["author-link"]))) {
 				$parent_contact = get_contact_details_by_url($thrparent[0]["author-link"]);