diff --git a/src/plugins/coreplugin/editormanager/editormanager.cpp b/src/plugins/coreplugin/editormanager/editormanager.cpp
index fd27a5f253d..83fc2583a8b 100644
--- a/src/plugins/coreplugin/editormanager/editormanager.cpp
+++ b/src/plugins/coreplugin/editormanager/editormanager.cpp
@@ -1696,8 +1696,12 @@ bool EditorManagerPrivate::saveDocumentAs(IDocument *document)
 
     Utils::MimeDatabase mdb;
     const QString filter = Utils::MimeDatabase::allFiltersString();
-    QString selectedFilter =
-        mdb.mimeTypeForFile(document->filePath().toFileInfo()).filterString();
+    QString selectedFilter;
+    QString filePath = document->filePath().toString();
+    if (filePath.isEmpty())
+        filePath = document->defaultPath() + QLatin1Char('/') + document->suggestedFileName();
+    if (!filePath.isEmpty())
+        selectedFilter = mdb.mimeTypeForFile(filePath).filterString();
     if (selectedFilter.isEmpty())
         selectedFilter = mdb.mimeTypeForName(document->mimeType()).filterString();
     const QString &absoluteFilePath =