diff --git a/shredder.sh b/shredder.sh
index 78ba718..86023d0 100644
--- a/shredder.sh
+++ b/shredder.sh
@@ -44,7 +44,7 @@ done
 
 while true; do
   for child in ${children}; do
-    if kill -0 ${child}; then
+    if kill -0 ${child} >/dev/null 2>&1; then
       activeChildren="${activeChildren} ${child}"
     fi
   done