diff --git a/src/backend/catalog/index.c b/src/backend/catalog/index.c
index 72f476b51de..716de171a45 100644
--- a/src/backend/catalog/index.c
+++ b/src/backend/catalog/index.c
@@ -74,7 +74,6 @@
 #include "storage/procarray.h"
 #include "storage/smgr.h"
 #include "utils/builtins.h"
-#include "utils/datum.h"
 #include "utils/fmgroids.h"
 #include "utils/guc.h"
 #include "utils/inval.h"