diff --git a/gcn/notices/core/Localization.schema.json b/gcn/notices/core/Localization.schema.json
index ba391ef6..ab8d5d11 100644
--- a/gcn/notices/core/Localization.schema.json
+++ b/gcn/notices/core/Localization.schema.json
@@ -14,7 +14,7 @@
       "description": "ICRS declination [deg], utilizes the J2000 epoch and an equatorial coordinate system"
     },
     "position_a_error": {
-      "description": "Radii of the semi-major axis [deg]. ",
+      "description": "Length of the semi-major axis [deg]. ",
       "type": "number"
     },
     "position_b_error": {