diff --git a/egs2/dirha_wsj/asr1/run.sh b/egs2/dirha_wsj/asr1/run.sh
index c290c03c80a..3de12e8b48a 100755
--- a/egs2/dirha_wsj/asr1/run.sh
+++ b/egs2/dirha_wsj/asr1/run.sh
@@ -5,8 +5,6 @@ set -e
 set -u
 set -o pipefail
 
-mic=
-
 train_set=train_si284
 valid_set=dirha_sim_Livingroom_Circular_Array_Beam_Circular_Array
 test_sets=