diff --git a/src/SFML/Audio/SoundFileReaderOgg.cpp b/src/SFML/Audio/SoundFileReaderOgg.cpp
index 9ea735657..e102bf94f 100644
--- a/src/SFML/Audio/SoundFileReaderOgg.cpp
+++ b/src/SFML/Audio/SoundFileReaderOgg.cpp
@@ -69,7 +69,7 @@ long tell(void* data)
     return position ? static_cast<long>(*position) : -1;
 }
 
-ov_callbacks callbacks = {&read, &seek, nullptr, &tell};
+const ov_callbacks callbacks = {&read, &seek, nullptr, &tell};
 } // namespace
 
 namespace sf::priv
diff --git a/test/Window/Event.test.cpp b/test/Window/Event.test.cpp
index 198c60c9d..4ea22af9f 100644
--- a/test/Window/Event.test.cpp
+++ b/test/Window/Event.test.cpp
@@ -7,7 +7,7 @@
 
 namespace
 {
-struct
+const struct
 {
     std::string_view operator()(const sf::Event::Closed&) const
     {