diff --git a/boot.php b/boot.php
index 1d8a9e7f76..070dcf7266 100644
--- a/boot.php
+++ b/boot.php
@@ -382,6 +382,7 @@ define ( 'ACTIVITY_UPDATE',      NAMESPACE_ACTIVITY_SCHEMA . 'update' );
 define ( 'ACTIVITY_TAG',         NAMESPACE_ACTIVITY_SCHEMA . 'tag' );
 define ( 'ACTIVITY_FAVORITE',    NAMESPACE_ACTIVITY_SCHEMA . 'favorite' );
 define ( 'ACTIVITY_SHARE',       NAMESPACE_ACTIVITY_SCHEMA . 'share' );
+define ( 'ACTIVITY_DELETE',      NAMESPACE_ACTIVITY_SCHEMA . 'delete' );
 
 define ( 'ACTIVITY_POKE',        NAMESPACE_ZOT . '/activity/poke' );
 define ( 'ACTIVITY_MOOD',        NAMESPACE_ZOT . '/activity/mood' );
diff --git a/include/ostatus.php b/include/ostatus.php
index 9b78495093..7dd3c8955e 100644
--- a/include/ostatus.php
+++ b/include/ostatus.php
@@ -367,7 +367,7 @@ class ostatus {
 
 			/// @TODO
 			/// Delete a message
-			if ($item["verb"] == "qvitter-delete-notice") {
+			if ($item["verb"] == "qvitter-delete-notice" || $item["verb"] == ACTIVITY_DELETE) {
 				// ignore "Delete" messages (by now)
 				logger("Ignore delete message ".print_r($item, true));
 				continue;