diff --git a/src/plugins/languageclient/languageclientmanager.cpp b/src/plugins/languageclient/languageclientmanager.cpp
index fd54d777005..0e5a80013b8 100644
--- a/src/plugins/languageclient/languageclientmanager.cpp
+++ b/src/plugins/languageclient/languageclientmanager.cpp
@@ -420,6 +420,8 @@ const QList<Client *> LanguageClientManager::clientsForProject(
 
 void LanguageClientManager::openDocumentWithClient(TextEditor::TextDocument *document, Client *client)
 {
+    if (!document)
+        return;
     Client *currentClient = clientForDocument(document);
     if (client == currentClient)
         return;