diff --git a/src/main/java/de/dhbwstuttgart/bytecode/utilities/Simplify.java b/src/main/java/de/dhbwstuttgart/bytecode/utilities/Simplify.java
index 49b1b4f4..d19d38dc 100644
--- a/src/main/java/de/dhbwstuttgart/bytecode/utilities/Simplify.java
+++ b/src/main/java/de/dhbwstuttgart/bytecode/utilities/Simplify.java
@@ -174,9 +174,11 @@ public class Simplify {
 		allCons.addAll(result.keySet());
 		
 		if(!allCons.isEmpty() && allCons.size()<2) {
-
-			if(!result.containsKey(allCons.get(0)))
-				result.put(allCons.get(0), null);
+			TPHConstraint cons = allCons.get(0);
+			if(!result.containsKey(cons)) {
+				result.put(cons, null);
+				result.put(new ExtendsConstraint(cons.getRight(), Type.getInternalName(Object.class), Relation.EXTENDS), null);
+			}
 			
 			return result;
 		}
diff --git a/src/test/java/bytecode/IdTest.java b/src/test/java/bytecode/IdTest.java
new file mode 100644
index 00000000..e60e6990
--- /dev/null
+++ b/src/test/java/bytecode/IdTest.java
@@ -0,0 +1,38 @@
+package bytecode;
+
+import static org.junit.Assert.*;
+
+import java.io.File;
+import java.lang.reflect.Field;
+import java.net.URL;
+import java.net.URLClassLoader;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+
+public class IdTest {
+
+	private static String path;
+	private static File fileToTest;
+	private static JavaTXCompiler compiler;
+	private static ClassLoader loader;
+	private static Class<?> classToTest;
+	private static String pathToClassFile;
+	private static Object instanceOfClass;
+	
+
+	@Test
+	public void test() throws Exception {
+		path = System.getProperty("user.dir")+"/src/test/resources/bytecodeJavFiles/Id.jav";
+		fileToTest = new File(path);
+		compiler = new JavaTXCompiler(fileToTest);
+		compiler.generateBytecode(System.getProperty("user.dir")+"/src/test/resources/testBytecode/generatedBC/");
+		pathToClassFile = System.getProperty("user.dir")+"/src/test/resources/testBytecode/generatedBC/";
+		loader = new URLClassLoader(new URL[] {new URL("file://"+pathToClassFile)});
+		classToTest = loader.loadClass("Id");
+		instanceOfClass = classToTest.getDeclaredConstructor().newInstance();
+	}
+
+}
diff --git a/src/test/resources/bytecodeJavFiles/Id.jav b/src/test/resources/bytecodeJavFiles/Id.jav
new file mode 100644
index 00000000..6cb5d4b0
--- /dev/null
+++ b/src/test/resources/bytecodeJavFiles/Id.jav
@@ -0,0 +1,6 @@
+public class Id {
+	
+	id(b){
+		return b;
+	}
+}
\ No newline at end of file