diff --git a/include/cute/algorithm/axpby.hpp b/include/cute/algorithm/axpby.hpp
index a01fb1df..b1a9cdb9 100644
--- a/include/cute/algorithm/axpby.hpp
+++ b/include/cute/algorithm/axpby.hpp
@@ -75,6 +75,8 @@ axpby(Alpha                    const& alpha,
     else {
       return beta == Int<0>{};
     }
+
+    CUTE_GCC_UNREACHABLE;
   } ();
 
   CUTE_UNROLL
diff --git a/include/cute/algorithm/tuple_algorithms.hpp b/include/cute/algorithm/tuple_algorithms.hpp
index 4eeebf8b..2cd8706b 100644
--- a/include/cute/algorithm/tuple_algorithms.hpp
+++ b/include/cute/algorithm/tuple_algorithms.hpp
@@ -743,6 +743,8 @@ repeat(X const& x)
   } else {
     return detail::construct(0, x, seq<>{}, make_seq<N>{}, seq<>{});
   }
+
+  CUTE_GCC_UNREACHABLE;
 }
 
 //