diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp
index c591cc5b49..ccd1326d94 100644
--- a/src/corelib/global/qglobal.cpp
+++ b/src/corelib/global/qglobal.cpp
@@ -1072,11 +1072,26 @@ bool qSharedBuild() Q_DECL_NOTHROW
     Defined on Darwin OS (synonym for Q_OS_MAC).
 */
 
+/*!
+    \macro Q_OS_WIN
+    \relates <QtGlobal>
+
+    Defined on all supported versions of Windows. That is, if
+    \l Q_OS_WIN32, \l Q_OS_WIN64 or \l Q_OS_WINCE is defined.
+*/
+
 /*!
     \macro Q_OS_WIN32
     \relates <QtGlobal>
 
-    Defined on all supported versions of Windows.
+    Defined on 32-bit and 64-bit versions of Windows (not on Windows CE).
+*/
+
+/*!
+    \macro Q_OS_WIN64
+    \relates <QtGlobal>
+
+    Defined on 64-bit versions of Windows.
 */
 
 /*!