diff --git a/llama-index-core/llama_index/core/schema.py b/llama-index-core/llama_index/core/schema.py
index 5b3c1d9302a3d..9ef8b58fe6c59 100644
--- a/llama-index-core/llama_index/core/schema.py
+++ b/llama-index-core/llama_index/core/schema.py
@@ -794,7 +794,7 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
                 kwargs["image_mimetype"] = ir.get("mimetype", None)
 
         mimetype = kwargs.get("image_mimetype")
-        if not mimetype and "image_path" in kwargs:
+        if not mimetype and kwargs.get("image_path") is not None:
             # guess mimetype from image_path
             extension = Path(kwargs["image_path"]).suffix.replace(".", "")
             if ftype := filetype.get_type(ext=extension):