diff --git a/src/plugins/platforms/wayland/qwaylandwindow.cpp b/src/plugins/platforms/wayland/qwaylandwindow.cpp
index 4f765f292c5..6b40cd28c40 100644
--- a/src/plugins/platforms/wayland/qwaylandwindow.cpp
+++ b/src/plugins/platforms/wayland/qwaylandwindow.cpp
@@ -889,6 +889,7 @@ QMargins QWaylandWindow::clientSideMargins() const
 void QWaylandWindow::setCustomMargins(const QMargins &margins) {
     const QMargins oldMargins = mCustomMargins;
     mCustomMargins = margins;
+    propagateSizeHints();
     setGeometry(geometry().marginsRemoved(oldMargins).marginsAdded(margins));
 }