diff --git a/applications/apertif/commissioning/main.py b/applications/apertif/commissioning/main.py
index e81188ea9d778fa8bd1bef43546b32c9cac82fd5..98550d139e8d745e4b86977aac9f7adcb4ab5fe8 100644
--- a/applications/apertif/commissioning/main.py
+++ b/applications/apertif/commissioning/main.py
@@ -225,7 +225,7 @@ print 'cmd = %s' % cmd
 shell.ssh_cmd(LCUS[0], cmd, tc)
 # We are now at ~bsn_init_sec-1. Enable the data path on the next PPS
 for lcu in LCUS:
-    cmd = ['/usr/bin/ssh', 'ssh', lcu, 'python', '$UPE/peripherals/util_bsn_source.py', '--unb', UNBS_BF, '--bn', '0:3', '-n', '1']
+    cmd = ['/usr/bin/ssh', 'ssh', '-x', lcu, 'python', '$UPE/peripherals/util_bsn_source.py', '--unb', UNBS_BF, '--bn', '0:3', '-n', '1']
     print cmd
     os.spawnl(os.P_NOWAIT, *cmd)
 
diff --git a/applications/apertif/commissioning/run_command_on_lcus.py b/applications/apertif/commissioning/run_command_on_lcus.py
index be2927c527690af16696f05bdf792f44afffbf38..75fc2035043f7ec5e61638f74119ceb3dd98da92 100644
--- a/applications/apertif/commissioning/run_command_on_lcus.py
+++ b/applications/apertif/commissioning/run_command_on_lcus.py
@@ -57,7 +57,7 @@ tc.append_log(0, lcu_str[:-1])
 tc.append_log(0, 'Issue parallel command')
 cmd_str = tc.gpString
 for lcu in LCUS:
-    lcu_cmd = ['/usr/bin/ssh', 'ssh', lcu, cmd_str]
+    lcu_cmd = ['/usr/bin/ssh','ssh', '-x', lcu, cmd_str]
     print lcu_cmd
     os.spawnl(os.P_NOWAIT, *lcu_cmd)