diff --git a/convert.py b/convert.py
index 7b9f043b2..2450c8f6d 100644
--- a/convert.py
+++ b/convert.py
@@ -1085,6 +1085,7 @@ def default_outfile(model_paths: List[Path], params: Params) -> Path:
     namestr = {
         GGMLFileType.AllF32: "f32",
         GGMLFileType.MostlyF16: "f16",
+        GGMLFileType.MostlyQ4_0: "q4_0",
         GGMLFileType.MostlyQ4_1: "q4_1",
         GGMLFileType.PerLayerIsQ4_1: "q4_1",
     }[params.file_type]