diff --git a/cros_run_bvt b/cros_run_bvt
index 55f5034..03d104b 100755
--- a/cros_run_bvt
+++ b/cros_run_bvt
@@ -103,7 +103,7 @@
   fi
   if [ -z "${DEBUG}" ]; then
     if [ "${DETECTED_SERVO_TYPE}" != "${FLAGS_servo_type}" ]; then
-      die "detected servo type does not match expected servo type"
+      die "detected servo type ${DETECTED_SERVO_TYPE} does not match expected servo type ${FLAGS_servo_type}"
     fi
   fi
 fi