diff --git a/jobhelper.sh b/jobhelper.sh
index 1158e2c128b78724bb9def2a68a1d34d4db5e203..d1efb90873c8e2fdb919daf772bb2b29d7aa00fb 100755
--- a/jobhelper.sh
+++ b/jobhelper.sh
@@ -336,7 +336,7 @@ function _j_setLogfile(){
 # ------------------------------------------------------------
 function j_requireBinary(){
   # echo "CHECK binary $1"
-  which "$1" >/dev/null
+  which "$1" >/dev/null 2>&1
   rcself=$?
   if [ $rcself -ne 0 ]; then
     rc=$rc+$rcself