diff --git a/test/archive.cpp b/test/archive.cpp
index 55e520e14..955b55a3d 100644
--- a/test/archive.cpp
+++ b/test/archive.cpp
@@ -106,8 +106,8 @@ TEST(ZimArchive, openingAnEmptyZimArchiveSucceeds)
   zim::Archive archive(tmpfile->path());
   ASSERT_TRUE(archive.check());
 
-  ASSERT_EQ(archive.getMediaCount(), 0);
-  ASSERT_EQ(archive.getArticleCount(), 0);
+  ASSERT_EQ(archive.getMediaCount(), 0U);
+  ASSERT_EQ(archive.getArticleCount(), 0U);
 }
 
 bool isNastyOffset(int offset) {