diff --git a/pytensor/configdefaults.py b/pytensor/configdefaults.py
index e383646949..f3a8b4a146 100644
--- a/pytensor/configdefaults.py
+++ b/pytensor/configdefaults.py
@@ -1155,14 +1155,14 @@ def _default_compiledirname() -> str:
     return safe
 
 
-def _filter_base_compiledir(path: Path) -> Path:
+def _filter_base_compiledir(path: str | Path) -> Path:
     # Expand '~' in path
-    return path.expanduser()
+    return Path(path).expanduser()
 
 
-def _filter_compiledir(path: Path) -> Path:
+def _filter_compiledir(path: str | Path) -> Path:
     # Expand '~' in path
-    path = path.expanduser()
+    path = Path(path).expanduser()
     # Turn path into the 'real' path. This ensures that:
     #   1. There is no relative path, which would fail e.g. when trying to
     #      import modules from the compile dir.
diff --git a/tests/test_config.py b/tests/test_config.py
index 59e261294d..65705c6988 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -3,6 +3,7 @@
 import configparser as stdlib_configparser
 import io
 import pickle
+from pathlib import Path
 
 import pytest
 
@@ -19,6 +20,18 @@ def _create_test_config():
     )
 
 
+def test_base_compiledir_str(tmp_path: Path):
+    base_compiledir = tmp_path
+    assert (
+        configdefaults._filter_base_compiledir(str(base_compiledir)) == base_compiledir
+    )
+
+
+def test_compiledir_str(tmp_path: Path):
+    compiledir = tmp_path
+    assert configdefaults._filter_compiledir(str(compiledir)) == compiledir
+
+
 def test_invalid_default():
     # Ensure an invalid default value found in the PyTensor code only causes
     # a crash if it is not overridden by the user.