diff --git a/tests/auto/corelib/tools/qcache/tst_qcache.cpp b/tests/auto/corelib/tools/qcache/tst_qcache.cpp
index beae524a58..2312a66d39 100644
--- a/tests/auto/corelib/tools/qcache/tst_qcache.cpp
+++ b/tests/auto/corelib/tools/qcache/tst_qcache.cpp
@@ -490,6 +490,7 @@ struct TrivialHashType {
 };
 quint64 qHash(TrivialHashType t, size_t seed = 0)
 {
+    Q_UNUSED(seed);
     return t.hash;
 }