diff --git a/src/de/dhbwstuttgart/bytecode/BytecodeGen.java b/src/de/dhbwstuttgart/bytecode/BytecodeGen.java
index a1bd4ae5..6f7acd64 100644
--- a/src/de/dhbwstuttgart/bytecode/BytecodeGen.java
+++ b/src/de/dhbwstuttgart/bytecode/BytecodeGen.java
@@ -67,7 +67,7 @@ public class BytecodeGen implements ASTVisitor {
 		className = classOrInterface.getClassName().toString();
 		// access flages??
 		cw.visit(Opcodes.V1_8, classOrInterface.getModifiers()+Opcodes.ACC_SUPER, classOrInterface.getClassName().toString()
-				, null, classOrInterface.getSuperClass().toString(), null);
+				, null, classOrInterface.getSuperClass().toString().replace(".", "/"), null);
 		
 		// for each field in the class
 		for(Field f : classOrInterface.getFieldDecl()) {