diff --git a/matlab/FindFreeSSH.m b/matlab/FindFreeSSH.m
index beefcbe..348dc5a 100644
--- a/matlab/FindFreeSSH.m
+++ b/matlab/FindFreeSSH.m
@@ -21,7 +21,7 @@ function host = FindFreeSSH(host_list, wait_time, command)
 
 if (nargin<3)
     % command which should return an empty string if host is available
-    command = 'ps -e user,args | grep openEMS';
+    command = 'ps -e | grep openEMS';
 end
 
 if (nargin<2)