diff --git a/src/openrct2-ui/UiContext.Win32.cpp b/src/openrct2-ui/UiContext.Win32.cpp
index 588dbd5d73..f2a669092a 100644
--- a/src/openrct2-ui/UiContext.Win32.cpp
+++ b/src/openrct2-ui/UiContext.Win32.cpp
@@ -11,6 +11,9 @@
 
 // Windows.h needs to be included first
 // clang-format off
+#    ifndef WIN32_LEAN_AND_MEAN
+#        define WIN32_LEAN_AND_MEAN
+#    endif
 #    include <windows.h>
 #    include <shellapi.h>
 // clang-format on
diff --git a/src/openrct2/platform/Platform.Common.cpp b/src/openrct2/platform/Platform.Common.cpp
index b285dd0c76..72246ddd82 100644
--- a/src/openrct2/platform/Platform.Common.cpp
+++ b/src/openrct2/platform/Platform.Common.cpp
@@ -11,6 +11,9 @@
 #include "../common.h"
 
 #ifdef _WIN32
+#    ifndef WIN32_LEAN_AND_MEAN
+#        define WIN32_LEAN_AND_MEAN
+#    endif
 #    include <windows.h>
 #endif
 
diff --git a/src/openrct2/platform/Platform.Win32.cpp b/src/openrct2/platform/Platform.Win32.cpp
index 8ecbda62d7..b900549d4d 100644
--- a/src/openrct2/platform/Platform.Win32.cpp
+++ b/src/openrct2/platform/Platform.Win32.cpp
@@ -10,6 +10,9 @@
 #ifdef _WIN32
 
 // Windows.h needs to be included first
+#    ifndef WIN32_LEAN_AND_MEAN
+#        define WIN32_LEAN_AND_MEAN
+#    endif
 #    include <windows.h>
 
 // Then the rest