diff --git a/indexify/src/indexify/executor/function_executor/server/subprocess_function_executor_server_factory.py b/indexify/src/indexify/executor/function_executor/server/subprocess_function_executor_server_factory.py
index 429f6e287..b7b668c9f 100644
--- a/indexify/src/indexify/executor/function_executor/server/subprocess_function_executor_server_factory.py
+++ b/indexify/src/indexify/executor/function_executor/server/subprocess_function_executor_server_factory.py
@@ -28,8 +28,7 @@ async def create(
         try:
             port = self._allocate_port()
             args = [
-                "--executor-id",
-                config.executor_id,
+                f"--executor-id={config.executor_id}",  # use = as executor_id can start with -
                 "--address",
                 _server_address(port),
             ]