diff --git a/include/seqan3/alignment/matrix/detail/debug_matrix.hpp b/include/seqan3/alignment/matrix/detail/debug_matrix.hpp
index 3205f11ba2..302dff33a4 100644
--- a/include/seqan3/alignment/matrix/detail/debug_matrix.hpp
+++ b/include/seqan3/alignment/matrix/detail/debug_matrix.hpp
@@ -494,7 +494,7 @@ struct alignment_matrix_printer<alignment_matrix_t>
         requires detail::is_type_specialisation_of_v<stream_t, debug_stream_type>
     constexpr void operator()(stream_t & stream, arg_t && arg) const
     {
-        print_impl(stream.get_underlying_stream(), stream.flags2(), std::forward<arg_t>(matrix));
+        print_impl(stream.get_underlying_stream(), stream.flags2(), std::forward<arg_t>(arg));
     }
 
     /*!\brief Prints the alignment matrix into the given stream using ascii formatting.
@@ -510,7 +510,7 @@ struct alignment_matrix_printer<alignment_matrix_t>
     template <typename stream_t, typename arg_t>
     constexpr void operator()(stream_t & stream, arg_t && arg) const
     {
-        print_impl(stream, fmtflags2::none, std::forward<arg_t>(matrix));
+        print_impl(stream, fmtflags2::none, std::forward<arg_t>(arg));
     }
 
 private: