diff --git a/atom/browser/ui/file_dialog_gtk.cc b/atom/browser/ui/file_dialog_gtk.cc
index 713b7b3ddb72..2c8b785544a2 100644
--- a/atom/browser/ui/file_dialog_gtk.cc
+++ b/atom/browser/ui/file_dialog_gtk.cc
@@ -44,7 +44,7 @@ class FileChooserDialog {
         filters_(filters) {
     const char* confirm_text = GTK_STOCK_OK;
 
-    if (button_label != NULL)
+    if (!button_label.empty())
       confirm_text = button_label.c_str();
     else if (action == GTK_FILE_CHOOSER_ACTION_SAVE)
       confirm_text = GTK_STOCK_SAVE;