diff --git a/src/openrct2/core/String.cpp b/src/openrct2/core/String.cpp
index 45070d58a0..93db9e39da 100644
--- a/src/openrct2/core/String.cpp
+++ b/src/openrct2/core/String.cpp
@@ -14,6 +14,12 @@
  *****************************************************************************/
 #pragma endregion
 
+#ifdef __MINGW32__
+// 0x0600 == vista
+#define WINVER 0x0600
+#define _WIN32_WINNT 0x0600
+#endif // __MINGW32__
+
 #include <cwctype>
 #include <stdexcept>
 #include <vector>