diff --git a/ui/platform/mac/ui_utility_mac.mm b/ui/platform/mac/ui_utility_mac.mm
index 803d1a7..3478157 100644
--- a/ui/platform/mac/ui_utility_mac.mm
+++ b/ui/platform/mac/ui_utility_mac.mm
@@ -41,6 +41,7 @@ void InitOnTopPanel(not_null<QWidget*> panel) {
 	Assert([platformWindow isKindOfClass:[NSPanel class]]);
 
 	auto platformPanel = static_cast<NSPanel*>(platformWindow);
+	[platformPanel setBackgroundColor:[NSColor clearColor]];
 	[platformPanel setLevel:NSModalPanelWindowLevel];
 	[platformPanel setCollectionBehavior:NSWindowCollectionBehaviorCanJoinAllSpaces|NSWindowCollectionBehaviorStationary|NSWindowCollectionBehaviorFullScreenAuxiliary|NSWindowCollectionBehaviorIgnoresCycle];
 	[platformPanel setHidesOnDeactivate:NO];