diff --git a/include/xtensor-python/xtensor_type_caster_base.hpp b/include/xtensor-python/xtensor_type_caster_base.hpp
index 5874595..840e28c 100644
--- a/include/xtensor-python/xtensor_type_caster_base.hpp
+++ b/include/xtensor-python/xtensor_type_caster_base.hpp
@@ -107,7 +107,7 @@ namespace pybind11
         struct pybind_array_dim_checker
         {
             template <class B>
-            static bool run(const B& buf)
+            static bool run(const B& /*buf*/)
             {
                 return true;
             }
@@ -138,7 +138,7 @@ namespace pybind11
         struct pybind_array_shape_checker
         {
             template <class B>
-            static bool run(const B& buf)
+            static bool run(const B& /*buf*/)
             {
                 return true;
             }