diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c
index 5008641baff..7a07c9c1ebd 100644
--- a/src/backend/storage/buffer/bufmgr.c
+++ b/src/backend/storage/buffer/bufmgr.c
@@ -1165,7 +1165,7 @@ PinBufferForBlock(Relation rel,
 	}
 	if (*foundPtr)
 	{
-		pgstat_count_io_op(io_object, io_context, IOOP_HIT);
+		pgstat_count_io_op(io_object, io_context, IOOP_HIT, 1);
 		if (VacuumCostActive)
 			VacuumCostBalance += VacuumCostPageHit;
 
@@ -2073,7 +2073,7 @@ again:
 		 * pinners or erroring out.
 		 */
 		pgstat_count_io_op(IOOBJECT_RELATION, io_context,
-						   from_ring ? IOOP_REUSE : IOOP_EVICT);
+						   from_ring ? IOOP_REUSE : IOOP_EVICT, 1);
 	}
 
 	/*
diff --git a/src/backend/storage/buffer/localbuf.c b/src/backend/storage/buffer/localbuf.c
index 80b7fc7efcc..cdb9da7e651 100644
--- a/src/backend/storage/buffer/localbuf.c
+++ b/src/backend/storage/buffer/localbuf.c
@@ -279,7 +279,7 @@ GetLocalVictimBuffer(void)
 		ClearBufferTag(&bufHdr->tag);
 		buf_state &= ~(BUF_FLAG_MASK | BUF_USAGECOUNT_MASK);
 		pg_atomic_unlocked_write_u32(&bufHdr->state, buf_state);
-		pgstat_count_io_op(IOOBJECT_TEMP_RELATION, IOCONTEXT_NORMAL, IOOP_EVICT);
+		pgstat_count_io_op(IOOBJECT_TEMP_RELATION, IOCONTEXT_NORMAL, IOOP_EVICT, 1);
 	}
 
 	return BufferDescriptorGetBuffer(bufHdr);
diff --git a/src/backend/utils/activity/pgstat_io.c b/src/backend/utils/activity/pgstat_io.c
index a7445995d32..b16f57ebeab 100644
--- a/src/backend/utils/activity/pgstat_io.c
+++ b/src/backend/utils/activity/pgstat_io.c
@@ -66,13 +66,7 @@ pgstat_bktype_io_stats_valid(PgStat_BktypeIO *backend_io,
 }
 
 void
-pgstat_count_io_op(IOObject io_object, IOContext io_context, IOOp io_op)
-{
-	pgstat_count_io_op_n(io_object, io_context, io_op, 1);
-}
-
-void
-pgstat_count_io_op_n(IOObject io_object, IOContext io_context, IOOp io_op, uint32 cnt)
+pgstat_count_io_op(IOObject io_object, IOContext io_context, IOOp io_op, uint32 cnt)
 {
 	Assert((unsigned int) io_object < IOOBJECT_NUM_TYPES);
 	Assert((unsigned int) io_context < IOCONTEXT_NUM_TYPES);
@@ -116,7 +110,7 @@ pgstat_prepare_io_time(bool track_io_guc)
 }
 
 /*
- * Like pgstat_count_io_op_n() except it also accumulates time.
+ * Like pgstat_count_io_op() except it also accumulates time.
  */
 void
 pgstat_count_io_op_time(IOObject io_object, IOContext io_context, IOOp io_op,
@@ -159,7 +153,7 @@ pgstat_count_io_op_time(IOObject io_object, IOContext io_context, IOOp io_op,
 		}
 	}
 
-	pgstat_count_io_op_n(io_object, io_context, io_op, cnt);
+	pgstat_count_io_op(io_object, io_context, io_op, cnt);
 }
 
 PgStat_IO *
diff --git a/src/include/pgstat.h b/src/include/pgstat.h
index f1dfe2b5e91..6475889c58c 100644
--- a/src/include/pgstat.h
+++ b/src/include/pgstat.h
@@ -603,8 +603,8 @@ extern PgStat_CheckpointerStats *pgstat_fetch_stat_checkpointer(void);
 
 extern bool pgstat_bktype_io_stats_valid(PgStat_BktypeIO *backend_io,
 										 BackendType bktype);
-extern void pgstat_count_io_op(IOObject io_object, IOContext io_context, IOOp io_op);
-extern void pgstat_count_io_op_n(IOObject io_object, IOContext io_context, IOOp io_op, uint32 cnt);
+extern void pgstat_count_io_op(IOObject io_object, IOContext io_context,
+							   IOOp io_op, uint32 cnt);
 extern instr_time pgstat_prepare_io_time(bool track_io_guc);
 extern void pgstat_count_io_op_time(IOObject io_object, IOContext io_context,
 									IOOp io_op, instr_time start_time, uint32 cnt);