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-rw-r--r--EdkUnixPkg/Dxe/UnixThunk/Chipset/Timer/Timer.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/EdkUnixPkg/Dxe/UnixThunk/Chipset/Timer/Timer.h b/EdkUnixPkg/Dxe/UnixThunk/Chipset/Timer/Timer.h
index 37ff8b26b3..2764d5f6ed 100644
--- a/EdkUnixPkg/Dxe/UnixThunk/Chipset/Timer/Timer.h
+++ b/EdkUnixPkg/Dxe/UnixThunk/Chipset/Timer/Timer.h
@@ -31,7 +31,7 @@ Abstract:
// Legal timer value range in 100 ns units
//
#define TIMER_MINIMUM_VALUE 0
-#define TIMER_MAXIMUM_VALUE (0x100000000 - 1)
+#define TIMER_MAXIMUM_VALUE (0x100000000ULL - 1)
//
// Default timer value in 100 ns units (10 ms)