diff --git a/Core/Core.cc b/Core/Core.cc
index 00094931c811e2daf1189661b947a806c749937e..7456f16602a1aeca41b82e947bc24d605b91c77f 100644
--- a/Core/Core.cc
+++ b/Core/Core.cc
@@ -301,7 +301,11 @@ Core::init() {
 
     coreWidget_->resize(width,height);
 
-    coreWidget_->setWindowTitle( OpenFlipper::Options::windowTitle() );
+    #ifdef DEBUG
+      coreWidget_->setWindowTitle( OpenFlipper::Options::windowTitle() + " [DEBUG]" );
+    #else
+      coreWidget_->setWindowTitle( OpenFlipper::Options::windowTitle() );
+    #endif
 
   }