diff --git a/src/include/executor/tuptable.h b/src/include/executor/tuptable.h
index 86e47c56af..7e6b40acb1 100644
--- a/src/include/executor/tuptable.h
+++ b/src/include/executor/tuptable.h
@@ -162,6 +162,8 @@ typedef struct TupleTableSlot
 /* routines for a TupleTableSlot implementation */
 struct TupleTableSlotOps
 {
+	/* body will be replaced in later commit */
+	int dummy;
 };
 
 /*