diff --git a/src/client/xdgshell_stable.cpp b/src/client/xdgshell_stable.cpp
--- a/src/client/xdgshell_stable.cpp
+++ b/src/client/xdgshell_stable.cpp
@@ -313,7 +313,7 @@
         s->q->setSize(s->pendingSize);
         s->pendingSize = QSize();
     }
-    s->pendingState = nullptr;
+    s->pendingState = {};
 }
 
 void XdgTopLevelStable::Private::configureCallback(void *data, struct xdg_toplevel *xdg_toplevel, int32_t width, int32_t height, struct wl_array *state)
diff --git a/src/client/xdgshell_v6.cpp b/src/client/xdgshell_v6.cpp
--- a/src/client/xdgshell_v6.cpp
+++ b/src/client/xdgshell_v6.cpp
@@ -297,7 +297,7 @@
         s->q->setSize(s->pendingSize);
         s->pendingSize = QSize();
     }
-    s->pendingState = nullptr;
+    s->pendingState = {};
 }
 
 void XdgTopLevelUnstableV6::Private::configureCallback(void *data, struct zxdg_toplevel_v6 *xdg_toplevel, int32_t width, int32_t height, struct wl_array *state)