diff --git a/src/client/registry.cpp b/src/client/registry.cpp
--- a/src/client/registry.cpp
+++ b/src/client/registry.cpp
@@ -545,7 +545,7 @@
     auto r = reinterpret_cast<Registry::Private*>(data);
     Q_ASSERT(r->callback == callback);
     r->handleGlobalSync();
-    r->callback.destroy();
+    r->callback.release();
 }
 
 void Registry::Private::handleGlobalSync()