diff --git a/src/notificationsmanager.cpp b/src/notificationsmanager.cpp
index 535f0a364..c05a35422 100644
--- a/src/notificationsmanager.cpp
+++ b/src/notificationsmanager.cpp
@@ -293,7 +293,11 @@ QPixmap NotificationsManager::createNotificationImage(const QImage &icon, NeoCha
     roundedImage.fill(Qt::transparent);
 
     QPainter painter(&roundedImage);
-    painter.setRenderHint(QPainter::Antialiasing);
+    painter.setRenderHint(QPainter::SmoothPixmapTransform);
+
+    // Fill background for transparent avatars
+    painter.setBrush(Qt::white);
+    painter.drawRoundedRect(imageRect, imageRect.width(), imageRect.height());
 
     QBrush brush(icon.scaledToHeight(biggestDimension));
     painter.setBrush(brush);
@@ -304,6 +308,9 @@ QPixmap NotificationsManager::createNotificationImage(const QImage &icon, NeoCha
         if (icon != roomAvatar) {
             const QRect lowerQuarter{imageRect.center(), imageRect.size() / 2};
 
+            painter.setBrush(Qt::white);
+            painter.drawRoundedRect(lowerQuarter, lowerQuarter.width(), lowerQuarter.height());
+
             painter.setBrush(roomAvatar.scaled(lowerQuarter.size()));
             painter.drawRoundedRect(lowerQuarter, lowerQuarter.width(), lowerQuarter.height());
         }