diff --git a/src/libostree/ostree-repo-commit.c b/src/libostree/ostree-repo-commit.c
index 35b16c71..6cfdc32b 100644
--- a/src/libostree/ostree-repo-commit.c
+++ b/src/libostree/ostree-repo-commit.c
@@ -881,11 +881,8 @@ _try_clone_from_payload_link (OstreeRepo   *self,
       else
         {
           /* This undoes all of the previous writes; we want to generate reflinked data.   */
-          if (ftruncate (tmpf->fd, 0) < 0)
-            return glnx_throw_errno_prefix (error, "ftruncate");
-
-          if (glnx_regfile_copy_bytes (fdf, tmpf->fd, -1) < 0)
-            return glnx_throw_errno_prefix (error, "regfile copy");
+          if (ioctl (tmpf->fd, FICLONE, fdf) < 0)
+            return glnx_throw_errno_prefix (error, "FICLONE");
 
           return TRUE;
         }