diff --git a/vllm/config/model.py b/vllm/config/model.py
index 2e0392f3caab..3e8e63be2e70 100644
--- a/vllm/config/model.py
+++ b/vllm/config/model.py
@@ -1140,6 +1140,7 @@ def is_mm_prefix_lm(self) -> bool:
             return bool(self.hf_config.is_mm_prefix_lm)
         # fallback to list of known models
         MM_PREFIX_LM_MODELS = (
+            "bagel",
             "gemma3",
             "molmo2",
             "paligemma",