diff --git a/examples/aishell/asr0/conf/deepspeech2.yaml b/examples/aishell/asr0/conf/deepspeech2.yaml
index 1dc8581e..ec9e02b6 100644
--- a/examples/aishell/asr0/conf/deepspeech2.yaml
+++ b/examples/aishell/asr0/conf/deepspeech2.yaml
@@ -23,7 +23,7 @@ augmentation_config: conf/augmentation.json
 random_seed: 0
 spm_model_prefix: 
 spectrum_type: linear
-feat_dim: 
+feat_dim: 161
 delta_delta: False
 stride_ms: 10.0
 window_ms: 20.0
diff --git a/examples/aishell/asr0/conf/deepspeech2_online.yaml b/examples/aishell/asr0/conf/deepspeech2_online.yaml
index c49973a2..05594e2d 100644
--- a/examples/aishell/asr0/conf/deepspeech2_online.yaml
+++ b/examples/aishell/asr0/conf/deepspeech2_online.yaml
@@ -23,7 +23,7 @@ augmentation_config: conf/augmentation.json
 random_seed: 0
 spm_model_prefix: 
 spectrum_type: linear #linear, mfcc, fbank
-feat_dim: 
+feat_dim: 161
 delta_delta: False
 stride_ms: 10.0
 window_ms: 20.0
diff --git a/examples/tiny/asr0/conf/deepspeech2.yaml b/examples/tiny/asr0/conf/deepspeech2.yaml
index a16a79d3..2cc4483e 100644
--- a/examples/tiny/asr0/conf/deepspeech2.yaml
+++ b/examples/tiny/asr0/conf/deepspeech2.yaml
@@ -23,7 +23,7 @@ augmentation_config: conf/augmentation.json
 random_seed: 0
 spm_model_prefix: 
 spectrum_type: linear
-feat_dim: 
+feat_dim: 161
 delta_delta: False
 stride_ms: 10.0
 window_ms: 20.0
diff --git a/examples/tiny/asr0/conf/deepspeech2_online.yaml b/examples/tiny/asr0/conf/deepspeech2_online.yaml
index 5458cfb3..3bd4f635 100644
--- a/examples/tiny/asr0/conf/deepspeech2_online.yaml
+++ b/examples/tiny/asr0/conf/deepspeech2_online.yaml
@@ -23,7 +23,7 @@ augmentation_config: conf/augmentation.json
 random_seed: 0
 spm_model_prefix: 
 spectrum_type: linear
-feat_dim: 
+feat_dim: 161
 delta_delta: False
 stride_ms: 10.0
 window_ms: 20.0