diff --git a/lib/Chat/ChatManager.php b/lib/Chat/ChatManager.php
index 9843720dd65..d59075c6e17 100644
--- a/lib/Chat/ChatManager.php
+++ b/lib/Chat/ChatManager.php
@@ -705,7 +705,7 @@ public function getUnreadCount(Room $chat, int $lastReadMessage): int {
 		$key = $chat->getId() . '-' . $lastReadMessage;
 		$unreadCount = $this->unreadCountCache->get($key);
 		if ($unreadCount === null) {
-			$unreadCount = $this->commentsManager->getNumberOfCommentsWithVerbsForObjectSinceComment('chat', (string)$chat->getId(), $lastReadMessage, [self::VERB_MESSAGE, 'object_shared']);
+			$unreadCount = $this->commentsManager->getNumberOfCommentsWithVerbsForObjectSinceComment('chat', (string)$chat->getId(), $lastReadMessage, [self::VERB_MESSAGE, self::VERB_OBJECT_SHARED]);
 			$this->unreadCountCache->set($key, $unreadCount, 1800);
 		}
 		return $unreadCount;
diff --git a/lib/Controller/ChatController.php b/lib/Controller/ChatController.php
index 2aa44cdccac..25489c9b648 100644
--- a/lib/Controller/ChatController.php
+++ b/lib/Controller/ChatController.php
@@ -1123,8 +1123,8 @@ public function markUnread(): DataResponse {
 				$previousMessage = $this->chatManager->getPreviousMessageWithVerb(
 					$this->room,
 					(int)$message->getId(),
-					[ChatManager::VERB_MESSAGE],
-					$message->getVerb() === ChatManager::VERB_MESSAGE
+					[ChatManager::VERB_MESSAGE, ChatManager::VERB_OBJECT_SHARED],
+					$message->getVerb() === ChatManager::VERB_MESSAGE || $message->getVerb() === ChatManager::VERB_OBJECT_SHARED
 				);
 				$unreadId = (int)$previousMessage->getId();
 			} catch (NotFoundException $e) {
diff --git a/tests/integration/features/chat-4/unread-messages.feature b/tests/integration/features/chat-4/unread-messages.feature
index ca91b95e474..ff068e93c08 100644
--- a/tests/integration/features/chat-4/unread-messages.feature
+++ b/tests/integration/features/chat-4/unread-messages.feature
@@ -202,3 +202,21 @@ Feature: chat-2/unread-messages
     Then user "participant2" is participant of room "group room" (v4)
       | unreadMessages |
       | 1              |
+
+  Scenario: marking conversation as unread marks last message as unread considering shared file
+    Given user "participant1" creates room "group room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    And user "participant1" sends message "Message 1" to room "group room" with 201
+    And user "participant1" sends message "Message 2" to room "group room" with 201
+    And user "participant1" shares "welcome.txt" with room "group room"
+    When user "participant1" marks room "group room" as unread with 200
+    Then user "participant1" is participant of room "group room" (v4)
+      | unreadMessages |
+      | 1              |
+    When user "participant1" sends message "Message 3" to room "group room" with 201
+    And user "participant1" marks room "group room" as unread with 200
+    Then user "participant1" is participant of room "group room" (v4)
+      | unreadMessages |
+      | 1              |
+