diff --git a/.changeset/plenty-turkeys-cheer.md b/.changeset/plenty-turkeys-cheer.md
new file mode 100644
index 000000000..d53cbb8cd
--- /dev/null
+++ b/.changeset/plenty-turkeys-cheer.md
@@ -0,0 +1,7 @@
+---
+"graphile-build-pg": patch
+"postgraphile": patch
+"@dataplan/pg": patch
+---
+
+Fix startCursor/endCursor for connections using pgUnionAll steps.