diff --git a/tools/check_code_style.sh b/tools/check_code_style.sh
index fa5126cd537ae6c299dfa73cdff9743586c0d738..235c291e6800fe2c668786c8d422a791aa08c0b2 100644
--- a/tools/check_code_style.sh
+++ b/tools/check_code_style.sh
@@ -7,7 +7,6 @@ function abort(){
 
 trap 'abort' 0
 set -e
-TRAVIS_BUILD_DIR=${PWD}
 cd $TRAVIS_BUILD_DIR
 export PATH=/usr/bin:$PATH
 pre-commit install