diff --git a/src/core/FunctionArgument.cs b/src/core/FunctionArgument.cs
index 44fed30..103223f 100644
--- a/src/core/FunctionArgument.cs
+++ b/src/core/FunctionArgument.cs
@@ -8,8 +8,8 @@ namespace csmic
 {
     public class FunctionArgument
     {
-        public required string Name { get; set; }
-        public required FunctionValue Value { get; set; }
+        public string Name { get; set; }
+        public FunctionValue Value { get; set; }
 
         public FunctionArgument(string name, FunctionValue fv) 
         {
diff --git a/src/stdlib/functions/AbsoluteValue.cs b/src/stdlib/functions/AbsoluteValue.cs
index 4578600..7279f9b 100644
--- a/src/stdlib/functions/AbsoluteValue.cs
+++ b/src/stdlib/functions/AbsoluteValue.cs
@@ -1,9 +1,5 @@
 using csmic;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using ValueType = csmic.ValueType;
 
 namespace stdlib.functions
 {
@@ -13,10 +9,7 @@ namespace stdlib.functions
         {
             get
             {
-                yield return new FunctionArgument(
-                    name: "value",
-                    fv: new FunctionValue(ValueType.Numeric, 0m)
-                );
+                yield return new FunctionArgument("value", new FunctionValue(ValueType.Numeric, 0m));
             }
         }