diff --git a/module/zfs/zil.c b/module/zfs/zil.c
index 4d714cefc758..645b1d4d80ba 100644
--- a/module/zfs/zil.c
+++ b/module/zfs/zil.c
@@ -1167,8 +1167,7 @@ zil_lwb_commit(zilog_t *zilog, itx_t *itx, lwb_t *lwb)
 				lrw->lr_offset += dnow;
 				lrw->lr_length -= dnow;
 				ZIL_STAT_BUMP(zil_itx_needcopy_count);
-				ZIL_STAT_INCR(zil_itx_needcopy_bytes,
-				    lrw->lr_length);
+				ZIL_STAT_INCR(zil_itx_needcopy_bytes, dnow);
 			} else {
 				ASSERT(itx->itx_wr_state == WR_INDIRECT);
 				dbuf = NULL;