diff --git a/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm b/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm
index 4ddc8b9a237..f2161fd9a7d 100644
--- a/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm
+++ b/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm
@@ -379,7 +379,10 @@ typedef QSharedPointer<QFileDialogOptions> SharedPointerFileDialogOptions;
     if (!m_helper)
         return;
 
-    if (!(path && path.length) || [path isEqualToString:m_currentDirectory])
+    if (!path || [path isEqual:NSNull.null] || !path.length)
+        return;
+
+    if ([path isEqualToString:m_currentDirectory])
         return;
 
     [m_currentDirectory release];