diff --git a/egs2/mini_an4/st1/conf/fbank.conf b/egs2/mini_an4/st1/conf/fbank.conf
index d75ddde4df8..82ac7bd0dbc 100755
--- a/egs2/mini_an4/st1/conf/fbank.conf
+++ b/egs2/mini_an4/st1/conf/fbank.conf
@@ -1,2 +1,2 @@
---sample-frequency=8000 
+--sample-frequency=16000 
 --num-mel-bins=80