diff --git a/schemas/VisibilityXds.json b/schemas/VisibilityXds.json
index 9f0ebbd1..1c1aa3f4 100644
--- a/schemas/VisibilityXds.json
+++ b/schemas/VisibilityXds.json
@@ -2151,6 +2151,7 @@
           "literal": [
             "fk5",
             "icrs",
+            "itrs",
             "APP"
           ],
           "name": "frame",
diff --git a/src/xradio/measurement_set/schema.py b/src/xradio/measurement_set/schema.py
index 89798188..723a143b 100644
--- a/src/xradio/measurement_set/schema.py
+++ b/src/xradio/measurement_set/schema.py
@@ -841,6 +841,7 @@ class WeightArray:
 AllowedUvwFrames = Literal[
     "fk5",
     "icrs",
+    "itrs",
     "APP",  # "apparent geocentric position", used in WSRT datasets
 ]