diff --git a/python/sglang/srt/server.py b/python/sglang/srt/server.py
index 3f410887c..e28530889 100644
--- a/python/sglang/srt/server.py
+++ b/python/sglang/srt/server.py
@@ -151,7 +151,7 @@ def launch_server(server_args: ServerArgs, pipe_finish_writer, model_overide_arg
         enable_show_time_cost()
     if server_args.disable_disk_cache:
         disable_cache()
-    if server_args.enable_flashinfer:
+    if not server_args.disable_flashinfer:
         assert_pkg_version("flashinfer", "0.0.7")
     if server_args.chat_template:
         # TODO: replace this with huggingface transformers template