diff --git a/src/plugins/platforms/xcb/qxcbwindow.cpp b/src/plugins/platforms/xcb/qxcbwindow.cpp
index dd260fe10ae..a7b3ce80053 100644
--- a/src/plugins/platforms/xcb/qxcbwindow.cpp
+++ b/src/plugins/platforms/xcb/qxcbwindow.cpp
@@ -1297,9 +1297,10 @@ void QXcbWindow::setWindowIcon(const QIcon &icon)
 
     if (!icon_data.isEmpty()) {
         // Ignore icon exceeding maximum xcb request length
-        if (icon_data.size() > xcb_get_maximum_request_length(xcb_connection())) {
-            qWarning("Ignoring window icon: Size %llu exceeds maximum xcb request length %u.",
-                     icon_data.size(), xcb_get_maximum_request_length(xcb_connection()));
+        if (quint64(icon_data.size()) > quint64(xcb_get_maximum_request_length(xcb_connection()))) {
+            qWarning() << "Ignoring window icon" << icon_data.size()
+                       << "exceeds maximum xcb request length"
+                       << xcb_get_maximum_request_length(xcb_connection());
             return;
         }
         xcb_change_property(xcb_connection(),