diff --git a/src/corelib/io/qdir.cpp b/src/corelib/io/qdir.cpp
index 5ddcd168323..47e32e335e9 100644
--- a/src/corelib/io/qdir.cpp
+++ b/src/corelib/io/qdir.cpp
@@ -1898,7 +1898,8 @@ bool QDir::isEmpty(Filters filters) const
     Returns a list of the root directories on this system.
 
     On Windows this returns a list of QFileInfo objects containing "C:/",
-    "D:/", etc. On other operating systems, it returns a list containing
+    "D:/", etc. This does not return drives with ejectable media that are empty.
+    On other operating systems, it returns a list containing
     just one root directory (i.e. "/").
 
     \sa root(), rootPath()