diff --git a/apps/dav/lib/CardDAV/CardDavBackend.php b/apps/dav/lib/CardDAV/CardDavBackend.php
index de209754ae4..d874ca2ce2b 100644
--- a/apps/dav/lib/CardDAV/CardDavBackend.php
+++ b/apps/dav/lib/CardDAV/CardDavBackend.php
@@ -127,7 +127,6 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 
 			// query for shared addressbooks
 			$principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
-			$principals = array_merge($principals, $this->principalBackend->getCircleMembership($principalUriOriginal));
 
 			$principals[] = $principalUri;