diff --git a/editor/SCsub b/editor/SCsub
index 4fa287c33b2..75dc188b860 100644
--- a/editor/SCsub
+++ b/editor/SCsub
@@ -76,7 +76,7 @@ if env['tools']:
 
     # Fonts
     flist = glob.glob(path + "/../thirdparty/fonts/*.ttf")
-    flist.append(glob.glob(path + "/../thirdparty/fonts/*.otf"))
+    flist.extend(glob.glob(path + "/../thirdparty/fonts/*.otf"))
     env.Depends('#editor/builtin_fonts.gen.h', flist)
     env.CommandNoCache('#editor/builtin_fonts.gen.h', flist, run_in_subprocess(editor_builders.make_fonts_header))