diff --git a/doc/endb.txt b/doc/endb.txt
index 09b22c8205..049f9d40df 100644
--- a/doc/endb.txt
+++ b/doc/endb.txt
@@ -7,6 +7,8 @@
 
 .. contents::
 
+**WARNING**: ENDB is not maintained anymore! Please help if you're interested
+in this tool.
 
 Nim comes with a platform independent debugger -
 the Embedded Nim Debugger (ENDB). The debugger is