diff --git a/src/openrct2/core/FileIndex.hpp b/src/openrct2/core/FileIndex.hpp
index 61acb843d4..18c9256a8d 100644
--- a/src/openrct2/core/FileIndex.hpp
+++ b/src/openrct2/core/FileIndex.hpp
@@ -206,7 +206,7 @@ private:
 
             size_t stepSize = 100; // Handpicked, seems to work well with 4/8 cores.
 
-            std::atomic<size_t> processed = ATOMIC_VAR_INIT(0);
+            std::atomic<size_t> processed{ 0 };
 
             auto reportProgress = [&]() {
                 const size_t completed = processed;
diff --git a/src/openrct2/network/Socket.cpp b/src/openrct2/network/Socket.cpp
index 55fb2cc8fd..38e53ea275 100644
--- a/src/openrct2/network/Socket.cpp
+++ b/src/openrct2/network/Socket.cpp
@@ -248,7 +248,7 @@ private:
 class TcpSocket final : public ITcpSocket, protected Socket
 {
 private:
-    std::atomic<SocketStatus> _status = ATOMIC_VAR_INIT(SocketStatus::Closed);
+    std::atomic<SocketStatus> _status{ SocketStatus::Closed };
     uint16_t _listeningPort = 0;
     SOCKET _socket = INVALID_SOCKET;