diff --git a/stimela/cargo/cab/simulator/src/run.py b/stimela/cargo/cab/simulator/src/run.py
index 3812fe1c..b2cfc401 100644
--- a/stimela/cargo/cab/simulator/src/run.py
+++ b/stimela/cargo/cab/simulator/src/run.py
@@ -137,7 +137,7 @@ def compute_vis_noise(msname, sefd, spw_id=0):
             NANT)*rms_perr, numpy.random.randn(NANT)*rms_perr
         ll, mm = " ".join(map(str, perr[0])), " ".join(map(str, perr[-1]))
         options['oms_pointing_errors.pe_l.values_str'] = "'%s'" % ll
-        options['oms_pointing_errors.pe_l.values_str'] = "'%s'" % mm
+        options['oms_pointing_errors.pe_m.values_str'] = "'%s'" % mm
 
 field_center = params.pop("field-center", None)
 if field_center and skymodel: