Avoid a shadow warning under old Clang [ci skip]

Bogus warning but whatever.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/cli/argparse.h b/src/cli/argparse.h
index 457716095..ebedfefb1 100644
--- a/src/cli/argparse.h
+++ b/src/cli/argparse.h
@@ -207,8 +207,8 @@ Argument_Parser::Argument_Parser(const std::string& spec,
    class CLI_Error_Invalid_Spec : public CLI_Error
       {
       public:
-         explicit CLI_Error_Invalid_Spec(const std::string& spec)
-            : CLI_Error("Invalid command spec '" + spec + "'") {}
+         explicit CLI_Error_Invalid_Spec(const std::string& bad_spec)
+            : CLI_Error("Invalid command spec '" + bad_spec + "'") {}
       };
 
    const std::vector<std::string> parts = Botan::split_on(spec, ' ');