diff --git a/examples/librispeech/s1/local/export.sh b/examples/librispeech/s1/local/export.sh
index fb0c3cfae..1b19d5720 100755
--- a/examples/librispeech/s1/local/export.sh
+++ b/examples/librispeech/s1/local/export.sh
@@ -13,7 +13,7 @@ ckpt_path_prefix=$2
 jit_model_export_path=$3
 
 device=gpu
-if [ ngpu != 0 ];then
+if [ ngpu == 0 ];then
     device=cpu
 fi
 
diff --git a/examples/librispeech/s1/local/test.sh b/examples/librispeech/s1/local/test.sh
index c5e61bff7..240a63b06 100755
--- a/examples/librispeech/s1/local/test.sh
+++ b/examples/librispeech/s1/local/test.sh
@@ -9,7 +9,7 @@ ngpu=$(echo $CUDA_VISIBLE_DEVICES | awk -F "," '{print NF}')
 echo "using $ngpu gpus..."
 
 device=gpu
-if [ ngpu != 0 ];then
+if [ ngpu == 0 ];then
     device=cpu
 fi
 config_path=$1
diff --git a/examples/librispeech/s1/local/train.sh b/examples/librispeech/s1/local/train.sh
index 47645d4b5..a4218aa86 100755
--- a/examples/librispeech/s1/local/train.sh
+++ b/examples/librispeech/s1/local/train.sh
@@ -12,9 +12,10 @@ config_path=$1
 ckpt_name=$2
 
 device=gpu
-if [ ngpu != 0 ];then
+if [ ngpu == 0 ];then
     device=cpu
 fi
+echo "using ${device}..."
 
 mkdir -p exp
 
diff --git a/examples/tiny/s1/local/export.sh b/examples/tiny/s1/local/export.sh
index fb0c3cfae..1b19d5720 100755
--- a/examples/tiny/s1/local/export.sh
+++ b/examples/tiny/s1/local/export.sh
@@ -13,7 +13,7 @@ ckpt_path_prefix=$2
 jit_model_export_path=$3
 
 device=gpu
-if [ ngpu != 0 ];then
+if [ ngpu == 0 ];then
     device=cpu
 fi
 
diff --git a/examples/tiny/s1/local/test.sh b/examples/tiny/s1/local/test.sh
index c5e61bff7..240a63b06 100755
--- a/examples/tiny/s1/local/test.sh
+++ b/examples/tiny/s1/local/test.sh
@@ -9,7 +9,7 @@ ngpu=$(echo $CUDA_VISIBLE_DEVICES | awk -F "," '{print NF}')
 echo "using $ngpu gpus..."
 
 device=gpu
-if [ ngpu != 0 ];then
+if [ ngpu == 0 ];then
     device=cpu
 fi
 config_path=$1
diff --git a/examples/tiny/s1/local/train.sh b/examples/tiny/s1/local/train.sh
index 47645d4b5..f8c9dbc0b 100755
--- a/examples/tiny/s1/local/train.sh
+++ b/examples/tiny/s1/local/train.sh
@@ -12,7 +12,7 @@ config_path=$1
 ckpt_name=$2
 
 device=gpu
-if [ ngpu != 0 ];then
+if [ ngpu == 0 ];then
     device=cpu
 fi