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-rw-r--r--MdePkg/Include/Base.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/MdePkg/Include/Base.h b/MdePkg/Include/Base.h
index d95fb0b850..6f411b08bc 100644
--- a/MdePkg/Include/Base.h
+++ b/MdePkg/Include/Base.h
@@ -494,7 +494,7 @@ typedef CHAR8 *VA_LIST;
@return A pointer to the beginning of a variable argument list.
**/
-#define VA_START(Marker, Parameter) (Marker = (VA_LIST) & (Parameter) + _INT_SIZE_OF (Parameter))
+#define VA_START(Marker, Parameter) (Marker = (VA_LIST) ((UINTN) & (Parameter) + _INT_SIZE_OF (Parameter)))
/**
Returns an argument of a specified type from a variable argument list and updates