diff --git a/src/NzbDrone.Mono/NzbDroneProcessProvider.cs b/src/NzbDrone.Mono/NzbDroneProcessProvider.cs
index 630b6e6653..79a2b35799 100644
--- a/src/NzbDrone.Mono/NzbDroneProcessProvider.cs
+++ b/src/NzbDrone.Mono/NzbDroneProcessProvider.cs
@@ -21,7 +21,7 @@ public List<ProcessInfo> FindNzbDroneProcesses()
 
             return monoProcesses.Where(c =>
             {
-                var processArgs = _processProvider.StartAndCapture("ps", String.Format("--pid {0} -o args=", c.Id));
+                var processArgs = _processProvider.StartAndCapture("ps", String.Format("-p {0} -o args=", c.Id));
 
                 return processArgs.Standard.Any(p => p.Contains(ProcessProvider.NZB_DRONE_PROCESS_NAME + ".exe") ||
                                                      p.Contains(ProcessProvider.NZB_DRONE_CONSOLE_PROCESS_NAME + ".exe"));