diff --git a/src/corelib/kernel/qproperty.cpp b/src/corelib/kernel/qproperty.cpp
index a4135b1f6f9..32b8882369f 100644
--- a/src/corelib/kernel/qproperty.cpp
+++ b/src/corelib/kernel/qproperty.cpp
@@ -267,6 +267,11 @@ void Qt::endPropertyUpdateGroup()
     }
 }
 
+// check everything stored in QPropertyBindingPrivate's union is trivially destructible
+// (though the compiler would also complain if that weren't the case)
+static_assert(std::is_trivially_destructible_v<QPropertyBindingSourceLocation>);
+static_assert(std::is_trivially_destructible_v<std::byte[sizeof(QPropertyBindingSourceLocation)]>);
+
 QPropertyBindingPrivate::~QPropertyBindingPrivate()
 {
     if (firstObserver)
diff --git a/src/corelib/kernel/qproperty_p.h b/src/corelib/kernel/qproperty_p.h
index 5105fd63437..d80ed211026 100644
--- a/src/corelib/kernel/qproperty_p.h
+++ b/src/corelib/kernel/qproperty_p.h
@@ -254,9 +254,8 @@ protected:
        is stored somewhere else. To make efficient use of the space, we instead provide a scratch space
        for QQmlPropertyBinding (which stores further binding information there).
        Anything stored in the union must be trivially destructible.
+       (checked in qproperty.cpp)
     */
-    static_assert(std::is_trivially_destructible_v<QPropertyBindingSourceLocation>);
-    static_assert(std::is_trivially_destructible_v<std::byte[sizeof(QPropertyBindingSourceLocation)]>);
     using DeclarativeErrorCallback = void(*)(QPropertyBindingPrivate *);
     union {
         QPropertyBindingSourceLocation location;