diff --git a/src/pdal/pipeline.py b/src/pdal/pipeline.py
index 60a181c0..e00b8c2d 100644
--- a/src/pdal/pipeline.py
+++ b/src/pdal/pipeline.py
@@ -217,7 +217,14 @@ def __or__(self, other: Union[Stage, Pipeline]) -> Pipeline:
 class InferableTypeStage(Stage):
     def __init__(self, filename: Optional[str] = None, **options: Any):
         if filename:
-            options["filename"] = filename
+            if isinstance(filename, dict):
+                if "path" not in filename:
+                    raise ValueError(f"'path' is missing in the provided filespec: {filename}")
+                options["filename"] = filename
+
+            else:
+                filespec = {'path':str(filename)}
+                options["filename"] = filespec
         super().__init__(**options)
 
     @property
@@ -226,7 +233,15 @@ def type(self) -> str:
             return super().type
         except KeyError:
             filename = self._options.get("filename")
-            return str(self._infer_type(filename) if filename else "")
+            if isinstance(filename, dict):
+                if "path" not in filename:
+                    raise ValueError(f"'path' is missing in the provided filespec: {filename}")
+                path = filename.get('path')
+            else:
+                path = str(filename)
+
+
+            return str(self._infer_type(path) if filename else "")
 
     _infer_type = staticmethod(lambda filename: "")
 
diff --git a/test/test_pipeline.py b/test/test_pipeline.py
index 46e0a18d..8760b1b5 100644
--- a/test/test_pipeline.py
+++ b/test/test_pipeline.py
@@ -3,7 +3,6 @@
 import os
 import sys
 
-from typing import List
 from itertools import product
 import numpy as np
 import pytest
@@ -284,6 +283,19 @@ def test_infer_stage_type(self):
         assert pdal.Writer("foo.xxx").type == ""
         assert pdal.Reader().type == ""
         assert pdal.Writer().type == ""
+        assert pdal.Reader({"path": "foo.las"}).type == "readers.las"
+        assert pdal.Writer({"path": "foo.las"}).type == "writers.las"
+        assert pdal.Reader({"path": "foo.xxx"}).type == ""
+        assert pdal.Writer({"path": "foo.xxx"}).type == ""
+        assert pdal.Reader({}).type == ""
+        assert pdal.Writer({}).type == ""
+
+    def test_filespec(self):
+        """Can transit filespecs"""
+        spec = {'path':'junk.las', 'headers':{'header1':'header_1', 'header2':'header_2'}, 'query':{'query1':'query_1', 'query2':'query_2'}}
+        assert pdal.Reader(spec).type == "readers.las"
+        assert pdal.Reader(spec).options['filename']['path'] == "junk.las"
+        assert pdal.Writer("foo.las").type == "writers.las"
 
     def test_streamable(self):
         """Can we distinguish streamable from non-streamable stages and pipeline"""