diff --git a/src/corelib/thread/qfuture_impl.h b/src/corelib/thread/qfuture_impl.h
index b09d84a6d39..29244083336 100644
--- a/src/corelib/thread/qfuture_impl.h
+++ b/src/corelib/thread/qfuture_impl.h
@@ -51,6 +51,7 @@
 #include <QtCore/qthreadpool.h>
 #include <QtCore/qexception.h>
 #include <QtCore/qpointer.h>
+#include <QtCore/qpromise.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -82,10 +83,6 @@ WhenAnyResult(qsizetype, const QFuture<T> &) -> WhenAnyResult<T>;
 
 namespace QtPrivate {
 
-template<class T, class U>
-using EnableIfSameOrConvertible = std::enable_if_t<std::is_same_v<T, U>
-                                                   || std::is_convertible_v<T, U>>;
-
 template<class T>
 using EnableForVoid = std::enable_if_t<std::is_same_v<T, void>>;
 
diff --git a/src/corelib/thread/qpromise.h b/src/corelib/thread/qpromise.h
index f62a2a54e31..f7abf8babc7 100644
--- a/src/corelib/thread/qpromise.h
+++ b/src/corelib/thread/qpromise.h
@@ -41,7 +41,7 @@
 #define QPROMISE_H
 
 #include <QtCore/qglobal.h>
-#include <QtCore/qfuture.h>
+#include <QtCore/qfutureinterface.h>
 
 #include <utility>
 
@@ -49,6 +49,13 @@ QT_REQUIRE_CONFIG(future);
 
 QT_BEGIN_NAMESPACE
 
+namespace QtPrivate {
+
+template<class T, class U>
+using EnableIfSameOrConvertible = std::enable_if_t<std::is_convertible_v<T, U>>;
+
+} // namespace QtPrivate
+
 template<typename T>
 class QPromise
 {