diff --git a/vllm/engine/arg_utils.py b/vllm/engine/arg_utils.py
index 970a8851f1799..ad26241235c0a 100644
--- a/vllm/engine/arg_utils.py
+++ b/vllm/engine/arg_utils.py
@@ -866,7 +866,7 @@ class EngineArgs:
                             '-O',
                             type=CompilationConfig.from_cli,
                             default=None,
-                            help='torch.compile configuration for the model.'
+                            help='torch.compile configuration for the model. '
                             'When it is a number (0, 1, 2, 3), it will be '
                             'interpreted as the optimization level.\n'
                             'NOTE: level 0 is the default level without '