diff --git a/gstlal-calibration/bin/gstlal_compute_strain b/gstlal-calibration/bin/gstlal_compute_strain
index f2fc4960d287e0fdcb696d52c48a481d7892fc6d..9c5fd765811dea97945c5b54c4a0d5e89ef7855f 100755
--- a/gstlal-calibration/bin/gstlal_compute_strain
+++ b/gstlal-calibration/bin/gstlal_compute_strain
@@ -1878,7 +1878,7 @@ if options.remove_powerlines:
 	if not options.remove_callines:
 		clean_strain = straintee
 	powerlines = calibration_parts.caps_and_progress(pipeline, head_dict["powerlines"], "audio/x-raw, format=F64LE, channels=1, channel-mask=(bitmask)0x0", "powerlines")
-	clean_strain = calibration_parts.remove_harmonics_with_witness(pipeline, clean_strain, powerlines, 60, 5, options.powerlines_freq_var, options.filter_latency, compute_rate = options.compute_factors_sr, rate_out = hoftsr, num_avg = options.powerlines_tf_averaging_time * options.powerlines_channel_sr, obsready = None if options.no_dq_vector else obsreadytee)
+	clean_strain = calibration_parts.remove_harmonics_with_witness(pipeline, clean_strain, powerlines, 60, 5, options.powerlines_freq_var, options.filter_latency, compute_rate = options.compute_factors_sr, rate_out = hoftsr, num_avg = options.powerlines_tf_averaging_time * options.compute_factors_sr, obsready = None if options.no_dq_vector else obsreadytee)
 
 # Remove excess noise using any provided witness channels
 if options.witness_channel_list is not None: