diff --git a/src/platformsupport/edid/qedidparser_p.h b/src/platformsupport/edid/qedidparser_p.h
index c5888dc5d70..c436155258c 100644
--- a/src/platformsupport/edid/qedidparser_p.h
+++ b/src/platformsupport/edid/qedidparser_p.h
@@ -47,10 +47,12 @@
 //  W A R N I N G
 //  -------------
 //
-// This file is not part of the Qt API.  It exists purely as an
-// implementation detail.  This header file may change from version to
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
 // version without notice, or even be removed.
 //
+// We mean it.
+//
 
 QT_BEGIN_NAMESPACE
 
diff --git a/src/platformsupport/edid/qedidvendortable_p.h b/src/platformsupport/edid/qedidvendortable_p.h
index 948a9cecfcd..6ec399df055 100644
--- a/src/platformsupport/edid/qedidvendortable_p.h
+++ b/src/platformsupport/edid/qedidvendortable_p.h
@@ -51,10 +51,12 @@
 //  W A R N I N G
 //  -------------
 //
-// This file is not part of the Qt API.  It exists purely as an
-// implementation detail.  This header file may change from version to
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
 // version without notice, or even be removed.
 //
+// We mean it.
+//
 
 QT_BEGIN_NAMESPACE
 
diff --git a/util/edid/qedidvendortable.py b/util/edid/qedidvendortable.py
index 500abf08903..bac84173260 100755
--- a/util/edid/qedidvendortable.py
+++ b/util/edid/qedidvendortable.py
@@ -86,10 +86,12 @@ header = """
 //  W A R N I N G
 //  -------------
 //
-// This file is not part of the Qt API.  It exists purely as an
-// implementation detail.  This header file may change from version to
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
 // version without notice, or even be removed.
 //
+// We mean it.
+//
 
 QT_BEGIN_NAMESPACE