diff --git a/src/stdafx.h b/src/stdafx.h
--- a/src/stdafx.h
+++ b/src/stdafx.h
@@ -303,13 +303,21 @@
 #define PACK(type_dec) PACK_N(type_dec, 1)
 
 /* MSVCRT of course has to have a different syntax for long long *sigh* */
-#if defined(_MSC_VER) || defined(__MINGW32__)
+#if defined(_MSC_VER)
 #   define OTTD_PRINTF64 "%I64d"
+#   define OTTD_PRINTF64U "%I64u"
+#   define OTTD_PRINTFHEX64 "%I64x"
+#   define PRINTF_SIZE "%Iu"
+#   define PRINTF_SIZEX "%IX"
+#elif defined(__MINGW32__)
+#   define OTTD_PRINTF64 "%I64d"
+#   define OTTD_PRINTF64U "%I64llu"
 #   define OTTD_PRINTFHEX64 "%I64x"
 #   define PRINTF_SIZE "%Iu"
 #   define PRINTF_SIZEX "%IX"
 #else
 #   define OTTD_PRINTF64 "%lld"
+#   define OTTD_PRINTF64U "%llu"
 #   define OTTD_PRINTFHEX64 "%llx"
 #   define PRINTF_SIZE "%zu"
 #   define PRINTF_SIZEX "%zX"