diff --git a/npa/src/npa-tool.ggo.in b/npa/src/npa-tool.ggo.in
index 243c0c1..5ec8503 100644
--- a/npa/src/npa-tool.ggo.in
+++ b/npa/src/npa-tool.ggo.in
@@ -136,7 +136,7 @@ option "read-dg12"      -
     "Read DG 12  (Optional Data)"
     flag off
 option "read-dg13"      -
-    "Read DG 13"
+    "Read DG 13  (Birth Name)"
     flag off
 option "read-dg14"      -
     "Read DG 14"