diff --git a/src/openrct2/GameStateSnapshots.cpp b/src/openrct2/GameStateSnapshots.cpp
index cb66ebc6cf..d89cec441a 100644
--- a/src/openrct2/GameStateSnapshots.cpp
+++ b/src/openrct2/GameStateSnapshots.cpp
@@ -9,7 +9,7 @@ static constexpr uint32_t InvalidTick = 0xFFFFFFFF;
 
 struct GameStateSnapshot_t
 {
-    GameStateSnapshot_t& operator=(GameStateSnapshot_t&& mv)
+    GameStateSnapshot_t& operator=(GameStateSnapshot_t&& mv) noexcept
     {
         tick = mv.tick;
         storedSprites = std::move(mv.storedSprites);
diff --git a/src/openrct2/core/MemoryStream.cpp b/src/openrct2/core/MemoryStream.cpp
index c4a58f8cab..dceec747e5 100644
--- a/src/openrct2/core/MemoryStream.cpp
+++ b/src/openrct2/core/MemoryStream.cpp
@@ -49,7 +49,7 @@ MemoryStream::MemoryStream(const void* data, size_t dataSize)
 {
 }
 
-MemoryStream::MemoryStream(MemoryStream&& mv)
+MemoryStream::MemoryStream(MemoryStream&& mv) noexcept
 {
     *this = std::move(mv);
 }
@@ -65,7 +65,7 @@ MemoryStream::~MemoryStream()
     _data = nullptr;
 }
 
-MemoryStream& MemoryStream::operator=(MemoryStream&& mv)
+MemoryStream& MemoryStream::operator=(MemoryStream&& mv) noexcept
 {
     _access = mv._access;
     _dataCapacity = mv._dataCapacity;
diff --git a/src/openrct2/core/MemoryStream.h b/src/openrct2/core/MemoryStream.h
index 3d322a8ffb..0d313654e2 100644
--- a/src/openrct2/core/MemoryStream.h
+++ b/src/openrct2/core/MemoryStream.h
@@ -36,13 +36,13 @@ private:
 public:
     MemoryStream() = default;
     MemoryStream(const MemoryStream& copy);
-    MemoryStream(MemoryStream&& mv);
+    MemoryStream(MemoryStream&& mv) noexcept;
     explicit MemoryStream(size_t capacity);
     MemoryStream(void* data, size_t dataSize, uint8_t access = MEMORY_ACCESS::READ);
     MemoryStream(const void* data, size_t dataSize);
     virtual ~MemoryStream();
 
-    MemoryStream& operator=(MemoryStream&& mv);
+    MemoryStream& operator=(MemoryStream&& mv) noexcept;
 
     const void* GetData() const override;
     void* GetDataCopy() const;