diff --git a/src/libsystemd/sd-varlink/sd-varlink-idl.c b/src/libsystemd/sd-varlink/sd-varlink-idl.c
index c0afc8c4e7..7e6680e0e6 100644
--- a/src/libsystemd/sd-varlink/sd-varlink-idl.c
+++ b/src/libsystemd/sd-varlink/sd-varlink-idl.c
@@ -899,7 +899,7 @@ static int varlink_idl_subparse_field_type(
         } else {
                 _cleanup_free_ char *token = NULL;
 
-                r = varlink_idl_subparse_token(p, line, column, /* valid_tokens= */ NULL, VALID_CHARS_IDENTIFIER, &token);
+                r = varlink_idl_subparse_token(p, line, column, /* allowed_delimiters= */ NULL, VALID_CHARS_IDENTIFIER, &token);
                 if (r < 0)
                         return r;
                 if (!token)