diff --git a/include/boost/random/discrete_distribution.hpp b/include/boost/random/discrete_distribution.hpp
index 3d14d4a02c..4b98beebd1 100644
--- a/include/boost/random/discrete_distribution.hpp
+++ b/include/boost/random/discrete_distribution.hpp
@@ -92,7 +92,7 @@ struct integer_alias_table {
         return _alias_table == other._alias_table &&
             _average == other._average && _excess == other._excess;
     }
-    static WeightType normalize(WeightType val, WeightType average)
+    static WeightType normalize(WeightType val, WeightType /*average*/)
     {
         return val;
     }
@@ -183,7 +183,7 @@ struct real_alias_table {
     {
         return true;
     }
-    static WeightType try_get_sum(const std::vector<WeightType>& weights)
+    static WeightType try_get_sum(const std::vector<WeightType>& /*weights*/)
     {
         return static_cast<WeightType>(1);
     }