diff --git a/zzz_evobackup b/zzz_evobackup
index 3ebe7e2..d20c6d8 100755
--- a/zzz_evobackup
+++ b/zzz_evobackup
@@ -117,7 +117,7 @@ pick_server() {
 if [ -e "${PIDFILE}" ]; then
     pid=$(cat "${PIDFILE}")
     # Does process still exist ?
-    if kill -O ${pid} 2> /dev/null; then
+    if kill -0 ${pid} 2> /dev/null; then
         # Killing the childs of evobackup.
         for ppid in $(pgrep -P "${pid}"); do
             kill -9 "${ppid}";