diff --git a/radicale/app/__init__.py b/radicale/app/__init__.py
index 8aa8d870b..6896bc701 100644
--- a/radicale/app/__init__.py
+++ b/radicale/app/__init__.py
@@ -197,7 +197,7 @@ def response(status: int, headers: types.WSGIResponseHeaders,
             if base_prefix_src == "HTTP_X_SCRIPT_NAME":
                 return response(*httputils.BAD_REQUEST)
             return response(*httputils.INTERNAL_SERVER_ERROR)
-        if base_prefix and base_prefix != "/" and base_prefix.endswith("/"):
+        if base_prefix.endswith("/"):
             logger.warning("Base prefix (from %s) must not end with '/': %r",
                            base_prefix_src, base_prefix)
             base_prefix = base_prefix.rstrip("/")