diff --git a/ext/install_kaldi.sh b/ext/install_kaldi.sh
index 1adbdaf6..10f1cc7e 100755
--- a/ext/install_kaldi.sh
+++ b/ext/install_kaldi.sh
@@ -2,8 +2,10 @@
 
 # Prepare Kaldi
 cd kaldi/tools
+make clean
 make atlas openfst OPENFST_VERSION=1.4.1
 cd ../src
+make clean
 ./configure --static --static-math=yes --static-fst=yes --use-cuda=no
 make depend
 cd ../../