diff --git a/resources/bytecode/javFiles/PaternMatchingHaskellStyle.jav b/resources/bytecode/javFiles/PaternMatchingHaskellStyle.jav
index a1283113..eff77af3 100644
--- a/resources/bytecode/javFiles/PaternMatchingHaskellStyle.jav
+++ b/resources/bytecode/javFiles/PaternMatchingHaskellStyle.jav
@@ -8,19 +8,14 @@ public record Elem<T>(T a) implements List<T> {}
 public class PaternMatchingHaskellStyle {
 
     public append(LinkedElem(a, b), list2) {
-        if (b instanceof Elem<?>) {
-            return handleElem(a, (Elem<?>) b, list2);
-        } else if (b instanceof LinkedElem<?>) {
-            return handleLinkedElem(a, (LinkedElem<?>) b, list2);
-        }
-        return null;
+        return handleAppend(a, b, list2);
     }
 
-    private handleElem(a, Elem(e), list2) {
-        return new LinkedElem<>(a, new LinkedElem<>(e, list2));
+    private handleAppend(a, Elem(e), list2) {
+        return new LinkedElem<>(a, new LinkedElem<>(e, list2));;
     }
 
-    private handleLinkedElem(a, LinkedElem(a,r), list2) {
-        return new LinkedElem<>(a, append(r, list2));
+    private handleAppend(a, LinkedElem(e,r), list2) {
+        return new LinkedElem<>(a, append(new LinkedElem(e, r), l2));
     }
 }
\ No newline at end of file
diff --git a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java
index ef861a7e..5a80acc8 100644
--- a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java
+++ b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java
@@ -153,7 +153,7 @@ public class StatementGenerator {
                 			: TypePlaceholder.fresh(fp.getStart());
                 }
                 ret.add(new FormalParameter(paramName, type, fp.getStart()));
-                localVars.put(paramName, type);
+                localVars.put(paramName, type); 
             }
         }
         return new ParameterList(ret, ret.get(0).getOffset());
diff --git a/src/test/java/TestComplete.java b/src/test/java/TestComplete.java
index 26546098..d018153d 100644
--- a/src/test/java/TestComplete.java
+++ b/src/test/java/TestComplete.java
@@ -854,7 +854,7 @@ public class TestComplete {
         assertEquals(m2.invoke(instance, 10), 10);
     }
 
-    @Ignore("Not implemented")
+    //@Ignore("Not implemented")
     @Test
     public void testOverloadPatternMatching() throws Exception {
         var classFiles = generateClassFiles(new ByteArrayClassLoader(), "PaternMatchingHaskellStyle.jav");