diff --git a/pgxn/neon/neon--1.6--1.5.sql b/pgxn/neon/neon--1.6--1.5.sql
index cb1b4da26a..3d9f523541 100644
--- a/pgxn/neon/neon--1.6--1.5.sql
+++ b/pgxn/neon/neon--1.6--1.5.sql
@@ -1 +1,3 @@
 DROP FUNCTION IF EXISTS save_local_cache_state();
+
+DROP FUNCTION IF EXISTS get_prewarm_info(out total_chunks integer, out curr_chunk integer, out prewarmed_pages integer, out skipped_pages integer);