diff --git a/resources/packageTest/pkg/sub/Interface.jav b/resources/packageTest/pkg/sub/Interface.jav
new file mode 100644
index 00000000..388b4249
--- /dev/null
+++ b/resources/packageTest/pkg/sub/Interface.jav
@@ -0,0 +1,3 @@
+package pkg.sub;
+
+public interface Interface {}
diff --git a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java
index 35e8f5f1..111bf11c 100644
--- a/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java
+++ b/src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java
@@ -333,7 +333,7 @@ public class SyntaxTreeGenerator {
 
   private ClassOrInterface convertInterface(Java17Parser.InterfaceDeclarationContext ctx, int modifiers) {
     this.superClass = new RefType(new JavaClassName("java.lang.Object"), new NullToken());
-    String className = this.pkgName.length() > 0 ? this.pkgName + "." : "" + ctx.identifier().getText();
+    String className = (this.pkgName.length() > 0 ? this.pkgName + "." : "") + ctx.identifier().getText();
     JavaClassName name = reg.getName(className); // Holt den Package Namen mit dazu
     if (!name.toString().equals(className)) { // Kommt die Klasse schon in einem anderen Package vor?
       throw new TypeinferenceException("Name " + className + " bereits vorhanden in " + reg.getName(className).toString(), ctx.getStart());
diff --git a/src/test/java/TestPackages.java b/src/test/java/TestPackages.java
index 045eb739..3f5d2c56 100644
--- a/src/test/java/TestPackages.java
+++ b/src/test/java/TestPackages.java
@@ -34,4 +34,14 @@ public class TestPackages {
 
         cmp.generateBytecode(bytecodeDirectory);
     }
+
+    @Test
+    public void testPackageInterface() throws Exception {
+        var cmp = new JavaTXCompiler(
+            List.of(new File("resources/packageTest/pkg/sub/Interface.jav")),
+            List.of(new File("resources/packageTest"))
+        );
+
+        cmp.generateBytecode(bytecodeDirectory);
+    }
 }