diff --git a/src/corelib/io/qstorageinfo_unix.cpp b/src/corelib/io/qstorageinfo_unix.cpp
index fcc7b8ca509..b9c98836090 100644
--- a/src/corelib/io/qstorageinfo_unix.cpp
+++ b/src/corelib/io/qstorageinfo_unix.cpp
@@ -503,6 +503,8 @@ static QByteArray extractSubvolume(const QStorageIterator &it)
         // if we didn't find the subvolume name, return the subvolume ID
         return id;
     }
+#else
+    Q_UNUSED(it);
 #endif
     return QByteArray();
 }