diff --git a/README.md b/README.md
index 66851fd..e278bdd 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,11 @@ core database, including those written in PL/pgSQL.
 
 The current list of "extras" include:
 
-- Procedures to help backfill data into compressed ranges
+## Diagnostic checks
+
+`diagnostic.sql`
+: Checks for common misconfigurations and issues that can affect
+performance and reliability of TimescaleDB installations.
 
 ## Useful views