diff --git a/src/widgets/util/qsystemtrayicon_win.cpp b/src/widgets/util/qsystemtrayicon_win.cpp
index f3d4347986..fa72e791ba 100644
--- a/src/widgets/util/qsystemtrayicon_win.cpp
+++ b/src/widgets/util/qsystemtrayicon_win.cpp
@@ -81,6 +81,7 @@ struct Q_NOTIFYICONIDENTIFIER {
 #    define NIN_BALLOONTIMEOUT (WM_USER + 4)
 #    define NIN_BALLOONUSERCLICK (WM_USER + 5)
 #    define NIF_SHOWTIP 0x00000080
+#    define NOTIFYICON_VERSION_4 4
 #endif
 
 #define Q_MSGFLT_ALLOW 1