diff --git a/src/serena/util/file_proxy.py b/src/serena/util/file_proxy.py
index 13fc070a..53685dc8 100644
--- a/src/serena/util/file_proxy.py
+++ b/src/serena/util/file_proxy.py
@@ -19,6 +19,12 @@ class FileProxy(ABC):
     def get_relative_path(self) -> str:
         """:return: the relative path reported by Serena (actual relative path or encoded external path)"""
 
+    @abstractmethod
+    def is_glob_supported(self):
+        """
+        :return: whether the proxy supports glob filtering based on its relative path
+        """
+
 
 class LocalProjectFileProxy(FileProxy):
     def __init__(self, relative_path: str, project: "Project"):
@@ -33,6 +39,9 @@ class LocalProjectFileProxy(FileProxy):
     def get_relative_path(self) -> str:
         return self._relative_path
 
+    def is_glob_supported(self):
+        return True
+
 
 class FileCollection:
     def __init__(self, file_proxies: list[FileProxy]):
@@ -67,9 +76,8 @@ class FileCollection:
 
         filtered_files = []
         for f in self._file_proxies:
-            if isinstance(f, LocalProjectFileProxy):
-                local_file: LocalProjectFileProxy = f
-                path = local_file.get_relative_path()
+            if f.is_glob_supported():
+                path = f.get_relative_path()
                 if include_glob_matcher:
                     if not include_glob_matcher.matches(path):
                         log.debug(f"Skipping {path}: does not match include pattern {paths_include_glob}")
diff --git a/test/serena/test_text_utils.py b/test/serena/test_text_utils.py
index bdfa6e76..71b0aad6 100644
--- a/test/serena/test_text_utils.py
+++ b/test/serena/test_text_utils.py
@@ -233,6 +233,9 @@ class MockFileProxy(FileProxy):
     def get_relative_path(self) -> str:
         return self.relative_path
 
+    def is_glob_supported(self):
+        return True
+
 
 class MockFileCollection(FileCollection):
     def __init__(self, file_paths, mock_reader: Callable[[str], str] = mock_reader_always_match):