diff --git a/radio/src/thirdparty/libopenui/src/layer.h b/radio/src/thirdparty/libopenui/src/layer.h
index 379a8a267..b39e0457b 100644
--- a/radio/src/thirdparty/libopenui/src/layer.h
+++ b/radio/src/thirdparty/libopenui/src/layer.h
@@ -37,14 +37,14 @@ class Layer
     static void push(Window * window)
     {
       if (!stack.empty()) {
-        Layer &parentLayer = stack.back();
+        Layer & parentLayer = stack.back();
         parentLayer.focus = Window::getFocus();
       }
       stack.emplace_back(Layer(window));
 
 #if defined(DEBUG_WINDOWS)
       TRACE_WINDOWS("New layer added for %s (%d layers)", window->getWindowDebugString().c_str(), stack.size());
-      for (auto layer: stack) {
+      for (auto & layer: stack) {
         TRACE_WINDOWS(" - %s (focus=%s)", layer.main->getWindowDebugString().c_str(), layer.focus ? layer.focus->getWindowDebugString().c_str() : "---");
       }
 #endif
@@ -71,8 +71,8 @@ class Layer
 
 #if defined(DEBUG_WINDOWS)
       TRACE_WINDOWS("Layer removed for %s (%d layers)", window->getWindowDebugString().c_str(), stack.size());
-      for (auto layer: stack) {
-        TRACE_WINDOWS(" - %s (focus=%s)", layer.main->getWindowDebugString().c_str(), layer.focus ? layer.focus->getWindowDebugString().c_str() : "---");
+      for (auto & layer: stack) {
+        TRACE(" - %s (focus=%s)", layer.main->getWindowDebugString().c_str(), layer.focus ? layer.focus->getWindowDebugString().c_str() : "---");
       }
 #endif
     }