diff --git a/eden/fs/cli/config.py b/eden/fs/cli/config.py
index 768c95ca30..8eddea30c2 100644
--- a/eden/fs/cli/config.py
+++ b/eden/fs/cli/config.py
@@ -171,12 +171,12 @@ class ListMountInfo(typing.NamedTuple):
 
     def to_json_dict(self) -> Dict[str, Any]:
         return {
-            "data_dir": str(self.data_dir),
+            "data_dir": self.data_dir.as_posix(),
             "state": MountState._VALUES_TO_NAMES.get(self.state)
             if self.state is not None
             else "NOT_RUNNING",
             "configured": self.configured,
-            "backing_repo": str(self.backing_repo)
+            "backing_repo": self.backing_repo.as_posix()
             if self.backing_repo is not None
             else None,
         }
diff --git a/eden/fs/cli/main.py b/eden/fs/cli/main.py
index 25794c22a6..b516439e78 100644
--- a/eden/fs/cli/main.py
+++ b/eden/fs/cli/main.py
@@ -608,7 +608,8 @@ class ListCmd(Subcmd):
         out: ui.Output, mount_points: Dict[Path, ListMountInfo]
     ) -> None:
         data = {
-            str(mount.path): mount.to_json_dict() for mount in mount_points.values()
+            mount.path.as_posix(): mount.to_json_dict()
+            for mount in mount_points.values()
         }
         json_str = json.dumps(data, sort_keys=True, indent=2)
         out.writeln(json_str)
@@ -631,7 +632,7 @@ class ListCmd(Subcmd):
                 state_name = MountState._VALUES_TO_NAMES[mount_info.state]
                 state_str = f" ({state_name})"
 
-            out.writeln(f"{path}{state_str}{suffix}")
+            out.writeln(f"{path.as_posix()}{state_str}{suffix}")
 
 
 class RepoError(Exception):