diff --git a/jarvis_util/shell/pbs_exec.py b/jarvis_util/shell/pbs_exec.py
index 7753529..b79d08d 100644
--- a/jarvis_util/shell/pbs_exec.py
+++ b/jarvis_util/shell/pbs_exec.py
@@ -55,7 +55,7 @@ def generate_qsub_command(self):
         non_equal_map ={
             'account': 'A',
             'queue': 'q',
-            'env_vars' : '-v'
+            'env_vars' : 'v'
         }
 
         if self.nnodes and self.system: