diff --git a/xpra/scripts/server.py b/xpra/scripts/server.py
index ac6450d7a5..477124553e 100644
--- a/xpra/scripts/server.py
+++ b/xpra/scripts/server.py
@@ -872,6 +872,7 @@ def show_progress(pct, text=""):
             import tempfile
             session_dir = osexpand(os.path.join(tempfile.gettempdir(), display_name.lstrip(":")))
             os.makedirs(session_dir, 0o750)
+        os.lchown(session_dir, uid, gid)
     os.environ["XPRA_SESSION_DIR"] = session_dir
     #populate it:
     if run_xpra_script: