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-rw-r--r--src/osd/windows/winprefix.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/osd/windows/winprefix.h b/src/osd/windows/winprefix.h
index 07f8800b787..b0b6fc22a15 100644
--- a/src/osd/windows/winprefix.h
+++ b/src/osd/windows/winprefix.h
@@ -6,7 +6,11 @@
//
//============================================================
-#define _WIN32_WINNT 0x0501
+#ifdef PTR64
+#define _WIN32_WINNT 0x0601 // Windows 7
+#else
+#define _WIN32_WINNT 0x0501 // Windows XP
+#endif
#ifdef _MSC_VER
#include <assert.h>