diff --git a/apps/dav/lib/Connector/Sabre/FilesReportPlugin.php b/apps/dav/lib/Connector/Sabre/FilesReportPlugin.php
index 3e85615638b5c..5896f4f37256f 100644
--- a/apps/dav/lib/Connector/Sabre/FilesReportPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/FilesReportPlugin.php
@@ -46,6 +46,7 @@ class FilesReportPlugin extends ServerPlugin {
 	const NS_OWNCLOUD = 'http://owncloud.org/ns';
 	const REPORT_NAME            = '{http://owncloud.org/ns}filter-files';
 	const SYSTEMTAG_PROPERTYNAME = '{http://owncloud.org/ns}systemtag';
+	const CIRCLE_PROPERTYNAME = '{http://owncloud.org/ns}circle';
 
 	/**
 	 * Reference to main server object
@@ -256,14 +257,19 @@ protected function processFilterRules($filterRules) {
 		$ns = '{' . $this::NS_OWNCLOUD . '}';
 		$resultFileIds = null;
 		$systemTagIds = [];
+		$circlesIds = [];
 		$favoriteFilter = null;
 		foreach ($filterRules as $filterRule) {
 			if ($filterRule['name'] === $ns . 'systemtag') {
 				$systemTagIds[] = $filterRule['value'];
 			}
+			if ($filterRule['name'] === self::CIRCLE_PROPERTYNAME) {
+				$circlesIds[] = $filterRule['value'];
+			}
 			if ($filterRule['name'] === $ns . 'favorite') {
 				$favoriteFilter = true;
 			}
+
 		}
 
 		if ($favoriteFilter !== null) {
@@ -282,6 +288,15 @@ protected function processFilterRules($filterRules) {
 			}
 		}
 
+		if (!empty($circlesIds)) {
+			$fileIds = $this->getCirclesFileIds($circlesIds);
+			if (empty($resultFileIds)) {
+				$resultFileIds = $fileIds;
+			} else {
+				$resultFileIds = array_intersect($fileIds, $resultFileIds);
+			}
+		}
+
 		return $resultFileIds;
 	}
 
@@ -328,6 +343,18 @@ private function getSystemTagFileIds($systemTagIds) {
 		return $resultFileIds;
 	}
 
+	/**
+	 * @param array $circlesIds
+	 * @return array
+	 */
+	private function getCirclesFileIds(array $circlesIds) {
+		if (!\OC::$server->getAppManager()->isEnabledForUser('circles') || !class_exists('\OCA\Circles\ShareByCircleProvider')) {
+			return array();
+		}
+		return \OCA\Circles\Api\v1\Circles::getFilesForCircles($circlesIds);
+	}
+
+
 	/**
 	 * Prepare propfind response for the given nodes
 	 *
diff --git a/apps/dav/lib/Connector/Sabre/Principal.php b/apps/dav/lib/Connector/Sabre/Principal.php
index a441e1c81225c..81d628d9a2d05 100644
--- a/apps/dav/lib/Connector/Sabre/Principal.php
+++ b/apps/dav/lib/Connector/Sabre/Principal.php
@@ -45,7 +45,7 @@
 use OCP\IUserSession;
 use OCP\Share\IManager as IShareManager;
 use Sabre\DAV\Exception;
-use \Sabre\DAV\PropPatch;
+use Sabre\DAV\PropPatch;
 use Sabre\DAVACL\PrincipalBackend\BackendInterface;
 
 class Principal implements BackendInterface {
@@ -145,7 +145,11 @@ public function getPrincipalByPath($path) {
 				return $this->userToPrincipal($user);
 			}
 		} else if ($prefix === 'principals/circles') {
-			return $this->circleToPrincipal($name);
+			try {
+				return $this->circleToPrincipal($name);
+			} catch (QueryException $e) {
+				return null;
+			}
 		}
 		return null;
 	}
@@ -406,6 +410,7 @@ public function getPrincipalPrefix() {
 	/**
 	 * @param string $circleUniqueId
 	 * @return array|null
+	 * @throws \OCP\AppFramework\QueryException
 	 * @suppress PhanUndeclaredClassMethod
 	 * @suppress PhanUndeclaredClassCatch
 	 */
@@ -438,9 +443,9 @@ protected function circleToPrincipal($circleUniqueId) {
 	 * Returns the list of circles a principal is a member of
 	 *
 	 * @param string $principal
-	 * @param bool $needGroups
 	 * @return array
 	 * @throws Exception
+	 * @throws \OCP\AppFramework\QueryException
 	 * @suppress PhanUndeclaredClassMethod
 	 */
 	public function getCircleMembership($principal):array {
@@ -456,15 +461,14 @@ public function getCircleMembership($principal):array {
 			}
 
 			$circles = \OCA\Circles\Api\v1\Circles::joinedCircles($name, true);
-
 			$circles = array_map(function($circle) {
-				/** @var \OCA\Circles\Model\Circle $group */
+				/** @var \OCA\Circles\Model\Circle $circle */
 				return 'principals/circles/' . urlencode($circle->getUniqueId());
 			}, $circles);
 
 			return $circles;
-
 		}
+
 		return [];
 	}
 
diff --git a/apps/dav/tests/unit/CalDAV/PublicCalendarRootTest.php b/apps/dav/tests/unit/CalDAV/PublicCalendarRootTest.php
index c10b333e28d85..874d4d84ffa77 100644
--- a/apps/dav/tests/unit/CalDAV/PublicCalendarRootTest.php
+++ b/apps/dav/tests/unit/CalDAV/PublicCalendarRootTest.php
@@ -86,6 +86,10 @@ public function setUp() {
 			->withAnyParameters()
 			->willReturn([]);
 
+		$this->principal->expects($this->any())->method('getCircleMembership')
+			->withAnyParameters()
+			->willReturn([]);
+
 		$this->backend = new CalDavBackend(
 			$db,
 			$this->principal,
@@ -112,6 +116,11 @@ public function tearDown() {
 		$this->principal->expects($this->any())->method('getGroupMembership')
 			->withAnyParameters()
 			->willReturn([]);
+
+		$this->principal->expects($this->any())->method('getCircleMembership')
+			->withAnyParameters()
+			->willReturn([]);
+
 		$books = $this->backend->getCalendarsForUser(self::UNIT_TEST_USER);
 		foreach ($books as $book) {
 			$this->backend->deleteCalendar($book['id']);
diff --git a/core/js/files/client.js b/core/js/files/client.js
index 2017becf87c66..98874d165bf35 100644
--- a/core/js/files/client.js
+++ b/core/js/files/client.js
@@ -503,7 +503,7 @@
 
 		/**
 		 * Fetches a flat list of files filtered by a given filter criteria.
-		 * (currently only system tags is supported)
+		 * (currently system tags and circles are supported)
 		 *
 		 * @param {Object} filter filter criteria
 		 * @param {Object} [filter.systemTagIds] list of system tag ids to filter by
@@ -525,7 +525,8 @@
 				properties = options.properties;
 			}
 
-			if (!filter || (!filter.systemTagIds && _.isUndefined(filter.favorite))) {
+			if (!filter ||
+				(!filter.systemTagIds && _.isUndefined(filter.favorite) && !filter.circlesIds) ) {
 				throw 'Missing filter argument';
 			}
 
@@ -551,6 +552,9 @@
 			_.each(filter.systemTagIds, function(systemTagIds) {
 				body += '        <oc:systemtag>' + escapeHTML(systemTagIds) + '</oc:systemtag>\n';
 			});
+			_.each(filter.circlesIds, function(circlesIds) {
+				body += '        <oc:circle>' + escapeHTML(circlesIds) + '</oc:circle>\n';
+			});
 			if (filter.favorite) {
 				body += '        <oc:favorite>' + (filter.favorite ? '1': '0') + '</oc:favorite>\n';
 			}