diff --git a/Tests/MathLib/AutoCheckTools.h b/Tests/MathLib/AutoCheckTools.h
index 466fb368e0b688bde605769022c74be01885ecfc..f9cf60847c06ba2c8b752caa688c24c5514c5cb3 100644
--- a/Tests/MathLib/AutoCheckTools.h
+++ b/Tests/MathLib/AutoCheckTools.h
@@ -44,7 +44,7 @@ struct IntervalGenerator
 		return _m * val + _n;
 	}
 
-	result_type operator()(std::size_t size = 0)
+	result_type operator()(std::size_t /*size*/ = 0)
 	{
 		return intervalMap(fix(1.0, generator)());
 	}
@@ -61,7 +61,7 @@ struct IntervalTupleGenerator
 
 	using result_type = std::array<T, 3>;
 
-	result_type operator()(std::size_t size = 0)
+	result_type operator()(std::size_t /*size*/ = 0)
 	{
 		return {{ x_gen(), y_gen(), z_gen() }};
 	}