diff --git a/ci_scripts/run_thread_sanitizer.sh b/ci_scripts/run_thread_sanitizer.sh
index ba23b48..0bb65f7 100755
--- a/ci_scripts/run_thread_sanitizer.sh
+++ b/ci_scripts/run_thread_sanitizer.sh
@@ -7,7 +7,7 @@ make
 
 # run the actual tests with sanitizer enabled, reporting the result
 TSAN_OPTIONS="log_path=sanitizer.log exitcode=1" ./bin/tests
-STATUS_CODE=?$
+STATUS_CODE=$?
 
 # rename the output log...
 mv sanitizer.log.* sanitizer.log