diff --git a/src/etc/tidy.py b/src/etc/tidy.py
index 3d44c27a16e6f..22053e974d36a 100644
--- a/src/etc/tidy.py
+++ b/src/etc/tidy.py
@@ -28,7 +28,7 @@
 
 def report_error_name_no(name, no, s):
     global err
-    print("%s:%d: %s" % (name, no, s))
+    print("\033[4;31m%s:%d: %s\033[0m" % (name, no, s))
     err=1
 
 def report_err(s):