diff --git a/src/gui/kernel/qinputdevice.cpp b/src/gui/kernel/qinputdevice.cpp
index 8a4066c0a36..f20351a5622 100644
--- a/src/gui/kernel/qinputdevice.cpp
+++ b/src/gui/kernel/qinputdevice.cpp
@@ -235,6 +235,13 @@ Q_CONSTINIT static QBasicMutex devicesMutex;
 /*!
     Returns a list of all registered input devices (keyboards and pointing devices).
 
+    \note The list of devices is not always complete on all platforms. So far,
+    the most-complete information is available on the \l {Qt for Linux/X11}{X11}
+    platform, at startup and in response to hot-plugging. Most other platforms
+    are only able to provide generic devices of various types, only after receiving
+    events from them; and most platforms do not tell Qt when a device is plugged in,
+    or when it is unplugged at runtime.
+
     \note The returned list cannot be used to add new devices. To add a simulated
     touch screen for an autotest, QTest::createTouchDevice() can be used.
     Platform plugins should call QWindowSystemInterface::registerInputDevice()