diff --git a/tests/test_xiphcomment.cpp b/tests/test_xiphcomment.cpp
index a29305e2..20a8a6f6 100644
--- a/tests/test_xiphcomment.cpp
+++ b/tests/test_xiphcomment.cpp
@@ -142,7 +142,7 @@ public:
     {
       Ogg::Vorbis::File f(newname.c_str());
       List<FLAC::Picture *> lst = f.tag()->pictureList();
-      CPPUNIT_ASSERT_EQUAL((unsigned int)1, lst.size());
+      CPPUNIT_ASSERT_EQUAL((size_t)1, lst.size());
       CPPUNIT_ASSERT_EQUAL((int)5, lst[0]->width());
       CPPUNIT_ASSERT_EQUAL((int)6, lst[0]->height());
       CPPUNIT_ASSERT_EQUAL((int)16, lst[0]->colorDepth());