diff --git a/pgrx-pg-sys/include/pg18.h b/pgrx-pg-sys/include/pg18.h
index b2b223401..2b30fe7c8 100644
--- a/pgrx-pg-sys/include/pg18.h
+++ b/pgrx-pg-sys/include/pg18.h
@@ -41,6 +41,7 @@
 #include "access/xlogutils.h"
 #include "catalog/catalog.h"
 #include "catalog/dependency.h"
+#include "catalog/heap.h"
 #include "catalog/index.h"
 #include "catalog/indexing.h"
 #include "catalog/namespace.h"