diff --git a/script/static-checks/static-checks-coding-style.sh b/script/static-checks/static-checks-coding-style.sh
index 4483b15..9ff51cf 100755
--- a/script/static-checks/static-checks-coding-style.sh
+++ b/script/static-checks/static-checks-coding-style.sh
@@ -24,7 +24,7 @@
 chmod +x $CI_ROOT/script/static-checks/checkpatch.pl
 
 CHECKPATCH=$CI_ROOT/script/static-checks/checkpatch.pl \
-  make checkpatch BASE_COMMIT=$(get_merge_base) &> "$LOG_FILE"
+  make checkpatch BASE_COMMIT=${merge_base} &> "$LOG_FILE"
 RES=$?
 
 if [[ "$RES" == 0 ]]; then