diff --git a/csharp/Lib/Units/Power/ActivePower.cs b/csharp/Lib/Units/Power/ActivePower.cs
index 6d859ad50..0fb663a80 100644
--- a/csharp/Lib/Units/Power/ActivePower.cs
+++ b/csharp/Lib/Units/Power/ActivePower.cs
@@ -12,6 +12,8 @@ public sealed class ActivePower : AcPower
     public static implicit operator ActivePower(Double d) => new ActivePower(d);
     public static implicit operator Double(ActivePower d) => d.Value;
     
-    public static ActivePower? operator -(ActivePower? d) => -d?.Value;
+    public static ActivePower operator -(ActivePower d) => -d.Value;
+    
+    
 }
 
diff --git a/csharp/Lib/Units/Power/ReactivePower.cs b/csharp/Lib/Units/Power/ReactivePower.cs
index 5c54095ab..ee6bb35cd 100644
--- a/csharp/Lib/Units/Power/ReactivePower.cs
+++ b/csharp/Lib/Units/Power/ReactivePower.cs
@@ -11,6 +11,6 @@ public sealed class ReactivePower : AcPower
     public static implicit operator ReactivePower(Double d) => new ReactivePower(d);
     public static implicit operator Double(ReactivePower d) => d.Value;
     
-    public static ReactivePower? operator -(ReactivePower? d) => -d?.Value;
+    public static ReactivePower operator -(ReactivePower d) => -d.Value;
 }