diff --git a/src/libs/utils/layoutbuilder.cpp b/src/libs/utils/layoutbuilder.cpp
index 41ae328b36b..42c947095f3 100644
--- a/src/libs/utils/layoutbuilder.cpp
+++ b/src/libs/utils/layoutbuilder.cpp
@@ -709,9 +709,9 @@ void Widget::setSize(int w, int h)
     access(this)->resize(w, h);
 }
 
-void Widget::setFixedSize(int w, int h)
+void Widget::setFixedSize(const QSize &size)
 {
-    access(this)->setFixedSize(w, h);
+    access(this)->setFixedSize(size);
 }
 
 void Widget::setAutoFillBackground(bool on)
diff --git a/src/libs/utils/layoutbuilder.h b/src/libs/utils/layoutbuilder.h
index 50f20681453..0aaaa8f0bc9 100644
--- a/src/libs/utils/layoutbuilder.h
+++ b/src/libs/utils/layoutbuilder.h
@@ -248,7 +248,7 @@ public:
     void setAutoFillBackground(bool);
     void setLayout(const Layout &layout);
     void setSize(int, int);
-    void setFixedSize(int, int);
+    void setFixedSize(const QSize &);
     void setWindowTitle(const QString &);
     void setWindowFlags(Qt::WindowFlags);
     void setWidgetAttribute(Qt::WidgetAttribute, bool on);
diff --git a/src/plugins/lua/bindings/gui.cpp b/src/plugins/lua/bindings/gui.cpp
index ed84c3056bf..33c137fe459 100644
--- a/src/plugins/lua/bindings/gui.cpp
+++ b/src/plugins/lua/bindings/gui.cpp
@@ -123,7 +123,7 @@ void setProperties(std::unique_ptr<T> &item, const sol::table &children, QObject
     if constexpr (has_setFixedSize<T>) {
         sol::optional<QSize> size = children.get<sol::optional<QSize>>("fixedSize");
         if (size)
-            item->setFixedSize(size->width(), size->height());
+            item->setFixedSize(*size);
     }
 
     if constexpr (has_setWordWrap<T>) {