diff --git a/projects/JVRC1/cnoid/clear-omninames.sh b/projects/JVRC1/cnoid/clear-omninames.sh
index 16032e6..d8b4fd8 100755
--- a/projects/JVRC1/cnoid/clear-omninames.sh
+++ b/projects/JVRC1/cnoid/clear-omninames.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 
 sudo /etc/init.d/omniorb4-nameserver stop
-sudo rm /var/log/omniorb-nameserver.log 2> /dev/null
-sudo rm /var/lib/omniorb/* 2> /dev/null
+sudo rm -f /var/log/omniorb-nameserver.log 2> /dev/null
+sudo rm -f /var/lib/omniorb/* 2> /dev/null
 sudo rm -f /tmp/rtcmanager.ref 2> /dev/null
 sudo /etc/init.d/omniorb4-nameserver start
 sleep 1