diff --git a/jarvis_util/shell/pbs_exec.py b/jarvis_util/shell/pbs_exec.py
index b79d08d..d4fce2e 100644
--- a/jarvis_util/shell/pbs_exec.py
+++ b/jarvis_util/shell/pbs_exec.py
@@ -75,7 +75,7 @@ def generate_qsub_command(self):
             if value is not None:
                 cmd += f' -{option} {value}'
 
-        cmd += f' -- {self.cmd}'
+        cmd += f' -- \"{self.cmd}\"'
         return cmd
 
     def pbscmd(self):