diff --git a/studio/backend/core/export/orchestrator.py b/studio/backend/core/export/orchestrator.py
index 500bc9e706..aa29396f4d 100644
--- a/studio/backend/core/export/orchestrator.py
+++ b/studio/backend/core/export/orchestrator.py
@@ -310,12 +310,16 @@ class ExportOrchestrator:
     def export_gguf(
         self,
         save_directory: str,
-        quantization_method: str = "Q4_K_M",
+        quantization_method: List[str],
         push_to_hub: bool = False,
         repo_id: Optional[str] = None,
         hf_token: Optional[str] = None,
     ) -> Tuple[bool, str]:
-        """Export model in GGUF format."""
+        """
+        Export model in GGUF format. The caller must supply a normalized
+        list of lowercase quantization method strings (see
+        `models.export.normalize_gguf_quantization_method`).
+        """
         return self._run_export(
             "gguf",
             {
diff --git a/studio/backend/core/export/worker.py b/studio/backend/core/export/worker.py
index 3f3dc955fa..65fe1542f4 100644
--- a/studio/backend/core/export/worker.py
+++ b/studio/backend/core/export/worker.py
@@ -139,7 +139,7 @@ def _handle_export(backend, cmd: dict, resp_queue: Any) -> None:
         elif export_type == "gguf":
             success, message = backend.export_gguf(
                 save_directory = cmd.get("save_directory", ""),
-                quantization_method = cmd.get("quantization_method", "Q4_K_M"),
+                quantization_method = cmd.get("quantization_method", ["Q4_K_M"]),
                 push_to_hub = cmd.get("push_to_hub", False),
                 repo_id = cmd.get("repo_id"),
                 hf_token = cmd.get("hf_token"),