diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp
index 8d80a32ad54..555b04dcd57 100644
--- a/src/corelib/global/qglobal.cpp
+++ b/src/corelib/global/qglobal.cpp
@@ -1400,6 +1400,13 @@ bool qSharedBuild() Q_DECL_NOTHROW
     \l Q_OS_WIN32, \l Q_OS_WIN64, or \l Q_OS_WINRT is defined.
 */
 
+/*!
+    \macro Q_OS_WINDOWS
+    \relates <QtGlobal>
+
+    This is a synonym for Q_OS_WIN.
+*/
+
 /*!
     \macro Q_OS_WIN32
     \relates <QtGlobal>
diff --git a/src/corelib/global/qsystemdetection.h b/src/corelib/global/qsystemdetection.h
index aabe46f3c27..a2e51fa3300 100644
--- a/src/corelib/global/qsystemdetection.h
+++ b/src/corelib/global/qsystemdetection.h
@@ -176,6 +176,7 @@
 #endif
 
 #if defined(Q_OS_WIN32) || defined(Q_OS_WIN64) || defined(Q_OS_WINRT)
+#  define Q_OS_WINDOWS
 #  define Q_OS_WIN
 #endif