diff --git a/scripts/InverseFourierTransformOfSquareRootOfFourierTransformOfJ0.arb b/scripts/InverseFourierTransformOfSquareRootOfFourierTransformOfJ0.arb
index 132c0cbfa..e37d322b0 100644
--- a/scripts/InverseFourierTransformOfSquareRootOfFourierTransformOfJ0.arb
+++ b/scripts/InverseFourierTransformOfSquareRootOfFourierTransformOfJ0.arb
@@ -1,6 +1,3 @@
-f
+
+var f = RealFunction.express("(√(π)*Γ(3/4)*J(1/4, |s|)*2^(1/4)/|s|^(1/4))");
 plot(-10,40,2000,f);
-f.eval(-2.3);
-plot(-10,40,2000,f);
-var f = RealFunction.express("(√(π)*Γ(3/4)*J(1/4, abs(s))*2^(1/4)/abs(s)^(1/4))");
-plot(-10,40,2000,f);
\ No newline at end of file
diff --git a/src/main/java/arb/expressions/nodes/DerivativeNode.java b/src/main/java/arb/expressions/nodes/DerivativeNode.java
index 8e5e6b76f..981febcfd 100644
--- a/src/main/java/arb/expressions/nodes/DerivativeNode.java
+++ b/src/main/java/arb/expressions/nodes/DerivativeNode.java
@@ -72,6 +72,13 @@ public class DerivativeNode<D, R, F extends Function<? extends D, ? extends R>>
                            Node<D, R, F>
 {
 
+  @Override
+  public Node<D, R, F> simplify()
+  {
+    derivative.isResult = isResult;
+    return derivative;
+  }
+
   @Override
   public String toString()
   {
@@ -132,6 +139,7 @@ public boolean isLeaf()
   public MethodVisitor generate(MethodVisitor mv, Class<?> resultType)
   {
     assert !resultType.equals(Object.class) : "Objects shan't be generated";
+    derivative.isResult = isResult;
     return derivative.generate(mv, resultType);
   }