diff --git a/OndselSolver/FullVector.h b/OndselSolver/FullVector.h
index 60b2b3f..53b3d4c 100644
--- a/OndselSolver/FullVector.h
+++ b/OndselSolver/FullVector.h
@@ -176,7 +176,7 @@ namespace MbD {
 		}
 	}
 	template<typename T>
-	inline void FullVector<T>::conditionSelfWithTol(double __attribute__((unused))tol)
+	inline void FullVector<T>::conditionSelfWithTol(double tol)
 	{
 		assert(false);
 		return;