diff --git a/src/include/pgstat.h b/src/include/pgstat.h
index 9bb777c3d5a..0e9d2b4c623 100644
--- a/src/include/pgstat.h
+++ b/src/include/pgstat.h
@@ -11,7 +11,6 @@
 #ifndef PGSTAT_H
 #define PGSTAT_H
 
-#include "access/transam.h"		/* for FullTransactionId */
 #include "datatype/timestamp.h"
 #include "portability/instr_time.h"
 #include "postmaster/pgarch.h"	/* for MAX_XFN_CHARS */
@@ -19,10 +18,16 @@
 #include "utils/backend_progress.h" /* for backward compatibility */	/* IWYU pragma: export */
 #include "utils/backend_status.h"	/* for backward compatibility */	/* IWYU pragma: export */
 #include "utils/pgstat_kind.h"
-#include "utils/relcache.h"
 #include "utils/wait_event.h"	/* for backward compatibility */	/* IWYU pragma: export */
 
 
+/* avoid including access/transam.h */
+typedef struct FullTransactionId FullTransactionId;
+
+/* avoid including utils/relcache.h */
+typedef struct RelationData *Relation;
+
+
 /* ----------
  * Paths for the statistics files (relative to installation's $PGDATA).
  * ----------