diff --git a/script/start_rpc_service.sh b/script/start_rpc_service.sh
index f52af23aa..3d5734cb1 100644
--- a/script/start_rpc_service.sh
+++ b/script/start_rpc_service.sh
@@ -83,9 +83,10 @@ for ((i = 0; i < ${#service_filename[*]}; i++)); do
   for j in ${service_ports}; do
     #Start the service in the background
     #    ./${service_filename[$i]} -port $j &
-    cmd="./${service_filename[$i]} -port $j"
+    
+    cmd="./${service_filename[$i]} -port $j -prometheus_port ${prome_ports[$i]}"
     if [ $i -eq 0 -o $i -eq 1 ]; then
-      cmd="./${service_filename[$i]} -port $j -prometheus_port ${prome_ports[$i]}"
+      cmd="./${service_filename[$i]} -port $j"
     fi
     echo $cmd
     nohup $cmd >>../logs/openIM.log 2>&1 &