diff --git a/tools/arkmanager b/tools/arkmanager
index 857cf1d..c7f4e7b 100755
--- a/tools/arkmanager
+++ b/tools/arkmanager
@@ -834,7 +834,7 @@ function isTheServerRunning(){
 function isTheServerUp(){
   local ip="$(getMultiHome)"
   result=1
-  if [ ! -x "$lsof" ]; then
+  if [ -x "$lsof" ]; then
     "$lsof" -w -i "${ip:+udp@}${ip}:$(getGamePort)" > /dev/null
     result=$?
   fi