Document how to build the typical argument for -s
diff --git a/scripts/abi_check.py b/scripts/abi_check.py
index 6edc54f..e8ab1cb 100755
--- a/scripts/abi_check.py
+++ b/scripts/abi_check.py
@@ -355,7 +355,9 @@
         )
         parser.add_argument(
             "-s", "--skip-file", type=str,
-            help="path to file containing symbols and types to skip"
+            help=("path to file containing symbols and types to skip "
+                  "(typically \"-s identifiers\" after running "
+                  "\"tests/scripts/list-identifiers.sh --internal\")")
         )
         parser.add_argument(
             "-b", "--brief", action="store_true",