diff --git a/fmriprep/data/io_spec.json b/fmriprep/data/io_spec.json
index 5d90f184..44b68456 100644
--- a/fmriprep/data/io_spec.json
+++ b/fmriprep/data/io_spec.json
@@ -41,7 +41,7 @@
       },
       "boldref2fmap": {
         "datatype": "func",
-        "from": "orig",
+        "from": "boldref",
         "mode": "image",
         "suffix": "xfm",
         "extension": ".txt"