diff --git a/src/plugins/platforms/wasm/qwasmcompositor.cpp b/src/plugins/platforms/wasm/qwasmcompositor.cpp
index ad4d249e5e6..9f6e686ac4f 100644
--- a/src/plugins/platforms/wasm/qwasmcompositor.cpp
+++ b/src/plugins/platforms/wasm/qwasmcompositor.cpp
@@ -326,8 +326,7 @@ void QWasmCompositor::drawWindowContent(QOpenGLTextureBlitter *blitter, QWasmScr
         return;
 
     QOpenGLTexture const *texture = backingStore->getUpdatedTexture();
-    QPoint windowCanvasPosition = window->geometry().topLeft() - screen->geometry().topLeft();
-    QRect windowCanvasGeometry = QRect(windowCanvasPosition, window->geometry().size());
+    QRect windowCanvasGeometry = window->geometry().translated(-screen->geometry().topLeft());
     blit(blitter, screen, texture, windowCanvasGeometry);
 }
 
@@ -585,7 +584,8 @@ void QWasmCompositor::drawWindowDecorations(QOpenGLTextureBlitter *blitter, QWas
     glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, image.width(), image.height(), GL_RGBA, GL_UNSIGNED_BYTE,
                     image.constScanLine(0));
 
-    blit(blitter, screen, &texture, QRect(window->windowFrameGeometry().topLeft(), QSize(width, height)));
+    QRect windowCanvasGeometry = window->windowFrameGeometry().translated(-screen->geometry().topLeft());
+    blit(blitter, screen, &texture, windowCanvasGeometry);
 }
 
 void QWasmCompositor::drawFrameWindow(QWasmFrameOptions options, QPainter *painter)