diff --git a/src/backend/optimizer/prep/prepunion.c b/src/backend/optimizer/prep/prepunion.c
index 05388355fd..55eeb5127c 100644
--- a/src/backend/optimizer/prep/prepunion.c
+++ b/src/backend/optimizer/prep/prepunion.c
@@ -23,7 +23,6 @@
  */
 #include "postgres.h"
 
-#include "access/heapam.h"
 #include "access/htup_details.h"
 #include "access/sysattr.h"
 #include "catalog/partition.h"